The Lamb: Offered in Sacrifice: from the Earliest Times
Source: TTT
Genesis 4:4
while Abel brought the best portions of the firstborn of his flock. And the LORD looked with favor on Abel and his offering,
Genesis 22:7, 8
Then Isaac said to his father Abraham, “My father!” “Here I am, my son,” he replied. “The fire and the wood are here,” said Isaac, “but where is the lamb for the burnt offering?” / Abraham answered, “God Himself will provide the lamb for the burnt offering, my son.” And the two walked on together.