Zachariah was a high priest from the Abijah’s division, and was married to Elizabeth both were from the tribe of Aaron and he served as a High Priest . Both were righteous in God’s sight, living without blame according to all the commands and requirements of the Lord.They had a son name John in the latter part of their lives. While Elizabeth expecting John was he unable to speak because did not believe the angel words while performing priestly in Herod Temple .
When Eliizbeth gave birth to John on the eighth day they circumcise him, however, the people were going to call him Zachariah, after his father. But his mother responded, “No! He will be called John. They summon Zachariah and he wrote the name John. Immediately his mouth was opened, and his tongue was set free, and he began to, praising God and pronounce a benediction, and filled with the Holy Spirit and began to prophesied concerning the future of the Messiah and his son John known as John Baptist.
KJV Bible Commentary wrote, ” In fact, there are no less than sixteen direct quotations or allusions to the Old Testament contained these few verses. Zachariah utters a remarkable prophecy which heralds the coming of the Messiah and His forerunner. It is in some ways The New Testament reiteration of the last chapter of the Old Testament.”
To understand Zachariah you need to think like a High priest and understand the sacrificial system written in the Old Testament handed down by God written by Moses.
1:69 provided redemption for His people. He has raised up a horn of salvation for us in the house of His servant David,
Redemption for His people; Redemption means liberation, deliverance, release from a debt. The Greek word is lutrósis; a feminine noun properly, the payment of the full ransom-price to free a slave. In short to purchase or redeemed mankind from the curse of sins.
Dictionary of Bible Themes,” Jesus Christ redeems believers from all forms of sinful bondage and oppression through his death and resurrection. The price of that redemption, his own death, represents a ransom paid to secure the freedom of those held in bondage to sin.”
Matthew Henry wrote, He has wrought out redemption for them: He has redeemed his people. This was the errand which Christ came into the world, to redeem those that were sold for sin, and sold under sin; even God’s own people, his Israel, his son, his first-born, his free-born, need to be redeemed, and are undone if they be not. Christ redeems them by price out of the hands of God’s justice and redeems them by power out of the hands of Satan’s tyranny, as Israel out of Egypt.
1:69 Horn of Salvation; It means a mighty deliverer. Eastern Bible Study defines as, The expression “horn of salvation,” applied to Christ, means a salvation of strength, or a strong Saviour triumph (xPs. 89:17, 24). To “lift up” the horn is to act proudly (Zech. 1:21). Horns are also the symbol of royal dignity and power (Jer. 48:25; Zech. 1:18; Dan. 8:24)
Mounce’s Complete Expository Dictionary wrote, “In Lk 1:69, Zac
hariah song praising Jesus’ coming birth uses keras to apply the Messiah’s “saving power ” referred to in Ps 18:2. ” Raising up the horn of salvation ” communicates a dramatic increase in power (cf. Deut 33:17). Several OT passages point to the coming of the Messiah by depicting the horn of David as exalted e.g., Ps 89:24; 132:17.” A symbol of power, victory, and salvation; e.g., Ps. 18:2; cf. Lk. 1:69 Barnes notes on the Bible, “So the Redeemer “may be ” called the “horn of salvation,” because those who flee to him are safe.”
Believer bible Commentary wrote, “A horn was used to hold the oil for anointing kings; therefore it might mean here a King of salvation from the kingly line of David. Or it might be a symbol of power and thus mean “a powerful Savior.”’
John Calvin wrote,” He hath raised up the horn of salvation. That is, saving power: for, when the throne of David was cast down, and the people scattered, the hope of salvation had to all appearance perished. Zacharias alludes to the predictions of the prophets, which hold out that a sudden revival would take place, when the state of affairs should have become melancholy and desperate. This mode of expression is borrowed from the passage, “There will I make the horn of David to bud: I have ordained a lamp for mine anointed,” (Ps. 132:17.) But if it is only in Christ thatc God has put forth his power to save us, we are not at liberty to depart from that method, if we desire to obtain salvation from God. Let it c very be also observed, that this horn brings salvation to believers, but terror to the ungodly, whom it scatters, or bruises and lays prostrate.
1:69 In the house of His servant David; Since both Zacharias and Elizabeth were Levites. The One raised up “In the house of…David” could not be John, but spoke of Someone greater than John.
In 2 Samuel 7:16 God told King David your throne will be established forever. Since the Second Temple was destroyed in 70 AD where all family records were kept. Christ’s Davidic reign will continue to reign through Christ found in Matthew1;1-16 and Luke 3;23-38
Luke 1;70 just as He spoke by the mouth of His holy prophets in ancient times; When Adam and Eve ate the forbidden fruit they spiritually died, and saw they naked were afraid, and sewed fig leaves together and made loincloths for themselves. Than the Lord put a curse on them; However, God address the snake first in Genesis 3:15 uttering the words, I will put hostility between you and the woman, and between your seed, and her seed. He will strike your head, and you will strike his heel. Than God slaughtered an animal made clothing out of skins for Adam and his wife, and He clothed them to cover their shame. A shadow of the reality that God would someday kill a substitute to redeem sinners.
Ellicott’s Commentary for English Readers wrote, “His holy prophets, which have been since the world began.–The words were probably more than a lofty paraphrase of the more usual language, “of old time,” “of ancient days,” and imply a reference to the great first Gospel, as it has been called, of Genesis 3:15, as well as to those made to Abraham who is the first person named as a prophet (Genesis 20:7).
1:71 God had promised to deliver the Israelites from their enemies. In Luke, these enemies include both human and spiritual forces (4:16–30; 11:14–26).
John Calvin wrote Zachariah was well aware, that the principal war of the church of God is not with flesh and blood, but with Satan and all his armament, by which he labours to accomplish our everlasting ruin. Though the Church is also attacked by outward foes, and is delivered from them by Christ, yet, as the kingdom of Christ is spiritual, it is chiefly to Satan, the prince of this world, and all his legions, that the present discourse relates. For example Job was attacked by Sabeans and Chaldeans ruin his life took everything from him; however, Satan and host were behind the attacks.
Matthew Hendry wrote Zacharias uttered a prophecy concerning the kingdom and salvation of the Messiah. The gospel brings light with it; in it the day dawns. In John the Baptist it began to break, and increased apace to the perfect day. The gospel is discovering; it shows that about which we were utterly in the dark; it is to give light to those that sit in darkness, the light of the knowledge of the glory of God in the face of Jesus Christ. It is reviving; it brings light to those that sit in the shadow of death, as condemned prisoners in the dungeon. It is directing; it is to guide our feet in the way of peace, into that way which will bring us to peace at last, Ro 3:17.
Luke1:72–73; Zechariah cites three aspects of God’s redeeming work: “salvation” (v.71), “mercy” (v.72), and the remembrance of God’s holy covenant
NIV Cultural Backgrounds Study Bible wrote to our father Abraham. When God acted to redeem his people in the past, he did so in remembrance of his covenant with Abraham, Isaac, and Jacob (Ex 2:24). He had also promised to do so whenever Israel turned to him (Lev 26:42). This showed his grace (2Ki 13:23; 1Ch 16:16; Ps 105:9). Scripture often speaks of God’s oath to the patriarchs (see especially Ge 22:16 – 18). See Genesis 12:1–3; 13:14–17; 15:1–6; 22:15–18.
The words “covenant” and “oath” form the central point of the song, emphasizing the importance of God’s covenant and his faithfulness to it. Not only does this serve as an important theme in Luke, but it also gives encouragement to us to trust the promises of God.
Luke 1:78 – 1:79 The Dawn from on high; The coming of the Messiah. Meaning, “Dawn from heaven will visit us.” Providing the light of truth and forgiveness to those blinded by the darkness of their sins.
While the wicked will be devoured by the heat of His wrath, those who fear Him will feel His warmth with healing in His “rays” or “beams”. Is. 30:26; 60:1, 3.
Believer Bible Commentary wrote,”Christ’s coming is likened to the sunrise. For centuries, the world had lain in darkness. Now through the tender mercy of our God, dawn was about to break. It would come in the Person of Christ, shining on the Gentiles who were in darkness and the shadow of death, and guiding Israel’s feet into the way of peace (see Mal. 4:2).
Zachariah would physical would not witness or hear his son utter these words “Here is the Lamb of God who takes away the sin of the world! This is the One I told you about: ‘After me comes a man who has surpassed me, because He existed before me. Nor did his father physical see Jesus Christ die on the cross; however, Zachariah did witness Jesus birth and his son birth who is the forerunner of Christ foretold by the prophet Isaiah who said”: A voice of one crying out in the wilderness: Prepare the way for the Lord; make His paths straight.” He physical saw the Savour of the world Jesus. The Adamic Covenant found in Genesis 3:16-19 will be fulfilled through
Jesus Christ where Satan head bruised and Satan would bruise His heel. In short, Zachariah physical saw prophecies about to be fulfilled fold told by the Old Testament prophets
https://www.biblegateway.com/passage/?search=Isaiah+40%3A3&version=NIV
https://www.gotquestions.org/Adamic-covenant.html
https://www.ligonier.org/learn/devotionals/adamic-covenant/
Gill’s Exposition of the Entire Bible