Hebrews 6:16

14saying, “Surely blessing I will bless you, and multiplying I will multiply you.”

15Thus, having patiently endured, he obtained the promise.

16For men indeed swear by a greater one, and in every dispute of theirs the oath is final for confirmation.

17In this way God, being determined to show more abundantly to the heirs of the promise the immutability of his counsel, interposed with an oath,

18that by two immutable things, in which it is impossible for God to lie, we may have a strong encouragement, who have fled for refuge to take hold of the hope set before us.