Luke 1:3-7

it seemed fitting to me as well, having investigated everything carefully from the beginning, to write it out for you in an orderly sequence, most excellent Theophilus;

so that you may know the exact truth about the things you have been taught. John the Baptist’s Birth Foretold

In the days of Herod, king of Judea, there was a priest named Zechariah, of the division of Abijah; and he had a wife from the daughters of Aaron, and her name was Elizabeth.

They were both righteous in the sight of God, walking blamelessly in all the commandments and requirements of the Lord.

And yet they had no child, because Elizabeth was infertile, and they were both advanced in years.