The ark of the covenant stores three pieces of evidence that God's promise has been fulfilled by Jesus's birth. Isaac spoke to his father, "Here are the fire and the wood, but where is the lamb for sacrifice?" Abraham answered, "God himself will provide the lamb." As Abraham looked about, he spied a ram caught by its horns in the thicket. God's promise to Abraham was fulfilled with the birth of Jesus who would be sacrificed on the cross as the Lamb of God.