Luke 1:12 (KJV)

And they had no child, because that Elisabeth was barren, and they both were now well stricken in years.

And it came to pass, that while he executed the priest's office before God in the order of his course,

According to the custom of the priest's office, his lot was to burn incense when he went into the temple of the Lord.

And the whole multitude of the people were praying without at the time of incense.

And there appeared unto him an angel of the Lord standing on the right side of the altar of incense.

But the angel said unto him, Fear not, Zacharias: for thy prayer is heard; and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.

And thou shalt have joy and gladness; and many shall rejoice at his birth.

For he shall be great in the sight of the Lord, and shall drink neither wine nor strong drink; and he shall be filled with the Holy Ghost, even from his mother's womb.

And many of the children of Israel shall he turn to the Lord their God.

And he shall go before him in the spirit and power of Elias, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord.