Verse 46: Mary replied to Elizabeth with a song of praise about God. This praise song of Mary clearly shows that she was a woman who pondered scriptures in her heart. Her praise song resembles to the prayer of Hannah (1 Samuel 2:1-10)
Verse 47-49 : Mary refers to herself as a servant of God as Hannah and David did in their prayers (1 Samuel 1:11, Psalm 136:23; 138:6) and she understood she was a sinner in need of salvation (Psalm 35:9). Mary didn’t hesitate to mention God’s might (Psalm 50:1; 62:7) and holiness (Exodus 15:11; Leviticus 20:26; Psalm 99:5)
Verse 50: As cited in Deuteronomy 5:10, Psalms 103:17: the steadfast love of the LORD is from everlasting to everlasting on those who fear him, and his righteousness to children’s children. The “fear of God” that Mary talks here is not about terror, but about the reverence that God deserves
Verse 51-53 : The “”Arm of God” (Psalm 89:13; 98:1) depicts His strength and abilities, which God had shown over the ages to humans. God humiliates those who walk in pride (Daniel 4:37; Proverbs 21:4) and He raises up the lowly and poor from the dust (Psalm 107:41; 1 Samuel 2:8). God provides to those who are needy (Psalm 34:10; Matthew 6:31–33) and the earthly wealth has no eternal value (Luke 6:24)
Verse 54-55: The Messiah was to come from the tribe of Judah (Genesis 49:10) and Isaiah records God referring to Israel as His servant and promising not to forsake the nation (Isaiah 44:21)
Verse 59 :The Old Testament law required a Jewish boy to be circumcised eight days after birth (Leviticus 12:3)
Verse 66: The hand of the Lord was indeed with John the Baptist in fulfilling the prophecies related to him, for he was the messenger sent ahead of Messiah (Isaiah 40:3; Malachi 3:1; 4:6)