Adam knew his wife Eve intimately, and she conceived and gave birth to Cain. She said, "I have had a male child with the LORD's help."[34] Then she also gave birth to his brother Abel. Now Abel became a shepherd of a flock, but Cain cultivated the land. In the course of time Cain presented some of the land's produce as an offering to the LORD. And Abel also presented [an offering][35] — some of the firstborn of his flock and their fat portions.[36] The Lord had regard for Abel and his offering, but He did not have regard for Cain and his offering. Cain was furious, and he was downcast.[37] Then the LORD said to Cain, "Why are you furious? And why are you downcast?[38] If you do right, won't you be accepted? But if you do not do right, sin is crouching at the door. Its desire is for you, but you must master it." Cain said to his brother Abel, "Let's go out to the field."[39] And while they were in the field, Cain attacked his brother Abel and killed him.