Genesis 22:1-8

Now after these things, God tested [the faith and commitment of] Abraham and said to him, “Abraham!” And he answered, “Here I am.” God said, “Take now your son, your only son [of promise], whom you love, Isaac, and go to the region of Moriah, and offer him there as a burnt offering on one of the mountains of which I shall tell you.” So Abraham got up early in the morning, saddled his donkey, and took two of his young men with him and his son Isaac; and he split the wood for the burnt offering, and then he got up and went to the place of which God had told him. On the third day [of travel] Abraham looked up and saw the place in the distance. Abraham said to his servants, “Settle down and stay here with the donkey; the young man and I will go over there and worship [God], and we will come back to you.” [Heb 11:17-19] Then Abraham took the wood for the burnt offering and laid it on [the shoulders of] Isaac his son, and he took the fire (firepot) in his own hand and the [sacrificial] knife; and the two of them walked on together. And Isaac said to Abraham, “My father!” And he said, “Here I am, my son.” Isaac said, “Look, the fire and the wood, but where is the lamb for the burnt offering?” Abraham said, “My son, God will provide for Himself a lamb for the burnt offering.” So the two walked on together.