God said to Abraham, "As for Sarai your wife, you shall not call her name Sarai, but her name will be Sarah.

"But if you will not do so, behold, you have sinned against the LORD; and be sure your sin will find you out.

Only be sure that you do not eat the blood: for the blood is the life; and you shall not eat the life with the flesh.

he will dwell on high. His place of defense will be the fortress of rocks. His bread will be supplied. His waters will be sure.

Zechariah said to the angel, "How can I be sure of this? For I am an old man, and my wife is well advanced in years."

For this cause it is of faith, that it may be according to grace, to the end that the promise may be sure to all the seed, not to that only which is of the law, but to that also which is of the faith of Abraham, who is the father of us all.