'Sworn' in the Bible

But Abram said to the king of Sodom, “I have raised my hand and sworn an oath to the Lord God Most High, the Creator and Possessor of heaven and earth,

and said, “By Myself (on the basis of Who I Am) I have sworn [an oath], declares the Lord, that since you have done this thing and have not withheld [from Me] your son, your only son [of promise],