Zechariah said to the angel, “How can I know this for certain? For I am an old man, and my wife is advanced in her days.”
Mary said to the angel, “How will this be, since I am a virgin?”
But they had no children because Elizabeth was barren, and they were both advanced in their days.
Because he was not weak in faith, he did not consider his own body, now as good as dead (since he was somewhere around a hundred years old), or the deadness of Sarah's womb.