18 And Zacharias said to the angel, How shall I know this: for I am old man, and my wife is advanced in years?
Luke 1:18 Cross References - Living_Oracles
Luke 1:7
7 And they had no child, because Elizabeth was barren, and they were advanced in years.
Luke 1:34
34 Then said Mary to the angel, How shall this be, since I have no intercourse with man?
Romans 4:19
19 And not being weak in faith, he did not consider his own body now dead, being about a hundred years old; neither the deadness of Sarah's womb.