Genesis 22:10-12

Abraham reached out his hand and took the knife to kill his son. [Heb 11:17-19] But the Angel of the LORD called to him from heaven and said, “Abraham, Abraham!” He answered, “Here I am.” 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].”