Luke 1:18

And Zacharias said to the angel, Whereby shall I know this? For I am an old man, and my wife advanced in years.

Luke 1:34

Then said Mary to the angel, How shall this be, seeing I know not a man?

Luke 1:7

And they had no child, because Elisabeth was barren, and they were both advanced in years.

Romans 4:19

And not being weak in faith, he considered not his own body now dead, being about an hundred years old, nor the deadness of Sarah's womb.

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, How shall this be, seeing I know not a man?

For

Luke 1:7
And they had no child, because Elisabeth was barren, and they were both advanced in years.
Romans 4:19
And not being weak in faith, he considered not his own body now dead, being about an hundred years old, nor the deadness of Sarah's womb.