Genesis 4:6

2Again she gave birth, to Cain’s brother Abel. Abel was a keeper of sheep, but Cain was a tiller of the ground.

3As time passed, Cain brought an offering to the LORD from the fruit of the ground.

4Abel also brought some of the firstborn of his flock and of its fat. The LORD respected Abel and his offering,

5but he didn’t respect Cain and his offering. Cain was very angry, and the expression on his face fell.

6The LORD said to Cain, “Why are you angry? Why has the expression of your face fallen?

7If you do well, won’t it be lifted up? If you don’t do well, sin crouches at the door. Its desire is for you, but you are to rule over it.”

8Cain said to Abel, his brother, “Let’s go into the field.” While they were in the field, Cain rose up against Abel, his brother, and killed him.

9The LORD said to Cain, “Where is Abel, your brother?” He said, “I don’t know. Am I my brother’s keeper?”

10The LORD said, “What have you done? The voice of your brother’s blood cries to me from the ground.