Luke 1:34—38

34 But Mary said to the angel, “How will this be, since I am a virgin?” 

35 The angel answered and said to her, “The Holy Spirit will come upon you, and the power of the Most High will overshadow you; and for that reason the holy Child shall be called the Son of God. 36 And behold, your relative Elizabeth has also conceived a son in her old age; and this is the sixth month for her who was called barren. 37 For nothing will be impossible with God.” 38 And Mary said, “Behold, the slave of the Lord; may it be done to me according to your word.” And the angel departed from her.

Referenced Scripture:

Exodus 40:34–35, John 1:14, Hebrews 1:3

Quotes:

The divine cloud that guided the Israelites in the wilderness and infused the tabernacle at Sinai completes the drama of salvation by infusing Mary’s womb with Jesus, the Son of God, and through Jesus, the apostolic community of faith.” Dr. James R. Edwards

“God gave the sign, not because Mary doubted the angel’s words, but to provide and anchor for her faith.” Dr. John MacArthur