Luke 1:17-21

He will go ahead of the Lord in the spirit and power of Elijah, to turn the fathers back to thinking about their children, and to turn those who are rebellious back to a right understanding—to prepare a people ready for the Lord.”

“How can I be sure about this?” Zechariah asked the angel. “I'm an old man, and my wife is getting old too.”

“I am Gabriel,” the angel replied. “I stand in God's presence, and I was sent to speak to you and give you this good news.

But since you didn't believe what I told you, you'll become dumb, unable to speak, until the appointed time when my words come true.”

Outside the people were waiting for Zechariah, wondering why he was taking so long in the Temple.