Hebrews 6
13 Ref For to Abraham God, having made promise, seeing He was able to swear by no greater, did swear by Himself,
14 Ref saying, `Blessing indeed I will bless thee, and multiplying I will multiply thee;'
15 Ref and so, having patiently endured, he did obtain the promise;
16 Ref for men indeed do swear by the greater, and an end of all controversy to them for confirmation `is' the oath,
17 Ref in which God, more abundantly willing to shew to the heirs of the promise the immutability of his counsel, did interpose by an oath,