Genesis 4:3-5, 15, 25

Later, Cain brought some food from the ground as a gift to God. Abel brought the best parts from some of the firstborn of his flock. The LORD accepted Abel and his gift, but he did not accept Cain and his gift. So Cain became very angry and felt rejected.

The LORD said to Cain, “No! If anyone kills you, I will punish that person seven times more.” Then the LORD put a mark on Cain warning anyone who met him not to kill him.

Adam had sexual relations with his wife Eve again, and she gave birth to a son. She named him Seth and said, “God has given me another child. He will take the place of Abel, who was killed by Cain.”