Genesis 22:16-18 Gen. 22:16-18
16 And said, By myself have I sworn, saith the LORD, for because thou hast done this thing, and hast not withheld thy son, thine only son: 17 That in blessing I will bless thee, and in multiplying I will multiply thy seed as the stars of the heaven, and as the sand which is upon the sea shore; and thy seed shall possess the gate of his enemies; 18 And in thy seed shall all the nations of the earth be blessed; because thou hast obeyed my voice.
Hebrews 6:13-17 Heb. 6:13-17
13 For when God made promise to Abraham, because he could swear by no greater, he sware by himself, 14 Saying, Surely blessing I will bless thee, and multiplying I will multiply thee. 15 And so, after he had patiently endured, he obtained the promise. 16 For men verily swear by the greater: and an oath for confirmation is to them an end of all strife. 17 Wherein God, willing more abundantly to shew unto the heirs of promise the immutability of his counsel, confirmed it by an oath:
(Relation)