Luke 1:16-20

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.

And behold, you will be silent and unable to speak until the day when these things take place, because you did not believe my words, which will be fulfilled at their proper time.”