Genesis 4:3-10

3And in the course of time Cain brought to the Lord an offering of the fruit of the ground.

4But Abel brought [an offering of] the [finest] firstborn of his flock and the fat portions. And the Lord had respect (regard) for Abel and for his offering;

5but for Cain and his offering He had no respect. So Cain became extremely angry (indignant), and he looked annoyed and hostile.

6And the Lord said to Cain, “Why are you so angry? And why do you look annoyed?

7If you do well [believing Me and doing what is acceptable and pleasing to Me], will you not be accepted? And if you do not do well [but ignore My instruction], sin crouches at your door; its desire is for you [to overpower you], but you must master it.”

8Cain talked with Abel his brother [about what God had said]. And when they were [alone, working] in the field, Cain attacked Abel his brother and killed him.

9Then the Lord said to Cain, “Where is Abel your brother?” And he [lied and] said, “I do not know. Am I my brother’s keeper?”

10The Lord said, “What have you done? The voice of your brother’s [innocent] blood is crying out to Me from the ground [for justice].