Genesis 22:4-7

4On the third day Abraham looked up and saw the place in the distance.

5He said to his servants, “Stay here with the donkey while I and the boy go over there. We will worship and then we will come back to you.” 6Abraham took the wood for the burnt offering and placed it on his son Isaac, and he himself carried the fire and the knife. As the two of them went on together,

7Isaac spoke up and said to his father Abraham, “Father?” “Yes, my son?” Abraham replied. “The fire and wood are here,” Isaac said, “but where is the lamb for the burnt offering?”