Genesis 22:12, 16

The LORD said, “Do not reach out [with the knife in] your hand against the boy, and do nothing to [harm] him; for now I know that you fear God [with reverence and profound respect], since you have not withheld from Me your son, your only son [of promise].”

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]