Genesis 22:6-8

So Abraham placed the wood for the burnt offering on Isaac’s shoulders, while he himself carried the fire and the knife. As the two of them walked on together, Isaac turned to Abraham and said, “Father?” “Yes, my son?” Abraham replied. “We have the fire and the wood,” the boy said, “but where is the sheep for the burnt offering?” “God will provide a sheep for the burnt offering, my son,” Abraham answered. And they both walked on together.