Genesis 22:11-13

but the angel of YAHWEH called to him from heaven, saying, “Abraham! Abraham!” “Yes, I’m here,” he answered. “Do not lay a hand on the boy or harm him,” he said, “for now, I know you are fully dedicated to me, since you did not withhold your son, your beloved son, from me.” As Abraham looked up, his eyes fell upon a ram caught by its horns in a nearby thicket. Abraham took the ram and sacrificed it on the altar as a burnt offering in Isaac’s place.