Luke 1:15-19

For he will be great in the sight of the Lord; and he will drink no wine or liquor, and he will be filled with the Holy Spirit while still in his mother’s womb.

And he will turn many of the sons of Israel back to the Lord their God.

And it is he who will go as a forerunner before Him in the spirit and power of Elijah, to turn the hearts of fathers back to their children, and the disobedient to the attitude of the righteous, to make ready a people prepared for the Lord.”

Zechariah said to the angel, “How will I know this? For I am an old man, and my wife is advanced in her years.”

The angel answered and said to him, “I am Gabriel, who stands in the presence of God, and I was sent to speak to you and to bring you this good news.