“Do not lay a hand on the boy,” he said.  “Do not do anything to him.  Now I know that you fear God, because you did not refuse to give me your son, your only son.”
¹³ When Abraham looked around, he saw a ram behind him caught by its horns in a bush.  So Abraham took the ram and sacrificed it as a burnt offering in place of his son.
(Genesis 22:12-13 -- GW)