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.
19 That hope we have as an anchor of the soul--an anchor that can neither break nor drag. It passes in behind the veil,