Genesis 4:2-8

Then she had another baby, Abel. Abel was a herdsman and Cain a farmer. Time passed. Cain brought an offering to GOD from the produce of his farm. Abel also brought an offering, but from the firstborn animals of his herd, choice cuts of meat. GOD liked Abel and his offering, but Cain and his offering didn’t get his approval. Cain lost his temper and went into a sulk. GOD spoke to Cain: “Why this tantrum? Why the sulking? If you do well, won’t you be accepted? And if you don’t do well, sin is lying in wait for you, ready to pounce; it’s out to get you, you’ve got to master it.” Cain had words with his brother. They were out in the field; Cain came at Abel his brother and killed him.