Luke 1:18

18 Zechariah said to the angel, "How shall I know if this is so? I am an old man, and my wife is old also."

Luke 1:18 In-Context

16 and he will bring back many of the people of Israel to the Lord their God.
17 He will go ahead of the Lord, strong and mighty like the prophet Elijah. He will bring fathers and children together again; he will turn disobedient people back to the way of thinking of the righteous; he will get the Lord's people ready for him."
18 Zechariah said to the angel, "How shall I know if this is so? I am an old man, and my wife is old also."
19 "I am Gabriel," the angel answered. "I stand in the presence of God, who sent me to speak to you and tell you this good news.
20 But you have not believed my message, which will come true at the right time. Because you have not believed, you will be unable to speak; you will remain silent until the day my promise to you comes true."
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.