Hebrews 6:13-18 For when God gave the promise to Abraham, since He had no one greater to swear by, He swore by Himself,

WNT⁽ⁱ⁾ ¹³ For when God gave the promise to Abraham, since He had no one greater to swear by, He swore by Himself, ¹⁴ saying, "ASSUREDLY I WILL BLESS YOU AND BLESS YOU, I WILL INCREASE YOU AND INCREASE YOU." ¹⁵ And so, as the result of patient waiting, our forefather obtained what God had promised. ¹⁶ For men swear by what is greater than themselves; and with them an oath in confirmation of a statement always puts an end to a dispute. ¹⁷ In the same way, since it was God's desire to display more convincingly to the heirs of the promise how unchangeable His purpose was, ¹⁸ He added an oath, in order that, through two unchangeable things, in which it is impossible for Him to prove false, we may possess mighty encouragement--we who, for safety, have hastened to lay hold of the hope set before us.