Luke 1:18

But Zacharias said to the angel, by what sign shall I know this? for I am old, and my wife is of a great age.

Luke 1:34

Then said Mary to the angel, what shall this be without any intercourse with man?

Luke 1:7

they had no children, because Elizabeth was steril, and they were both advanced in years.

Romans 4:19

far from being weak in faith, unconcern'd at his own bodily decay, being then about an hundred years old, and at Sarah's incapacity of child-bearing,

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
Then said Mary to the angel, what shall this be without any intercourse with man?

For

Luke 1:7
they had no children, because Elizabeth was steril, and they were both advanced in years.
Romans 4:19
far from being weak in faith, unconcern'd at his own bodily decay, being then about an hundred years old, and at Sarah's incapacity of child-bearing,