Luke 1:18

Then Zechariah said to the angel, "How shall I know that this is so? For I am an old man, and my wife is far advanced in years."

Luke 1:34

But Mary said to the angel, "How can this be, since I have no husband?"

Luke 1:7

And they had no child, because Elizabeth was barren, and both of them were far advanced in years.

Romans 4:19

Because he never weakened in faith, he calmly contemplated his own vital powers as worn out (for he was about one hundred years old) and the inability of Sarah to bear a child,

Treasury of Scripture Knowledge

Summary

And Zacharias said unto the angel, Whereby shall I know this? for I am an old man, and my wife well stricken in years.

Whereby

Bible References

Whereby

Luke 1:34
But Mary said to the angel, "How can this be, since I have no husband?"

For

Luke 1:7
And they had no child, because Elizabeth was barren, and both of them were far advanced in years.
Romans 4:19
Because he never weakened in faith, he calmly contemplated his own vital powers as worn out (for he was about one hundred years old) and the inability of Sarah to bear a child,