Genesis 3:14-4:7 NASB
14 The Lord God said to the serpent,
1 Now the man had relations with his wife Eve, and she conceived and gave birth to Cain, and she said, "I have gotten a manchild with the help of the Lord." 2 Again, she gave birth to his brother Abel. And Abel was a keeper of flocks, but Cain was a tiller of the ground. 3 So it came about in the course of time that Cain brought an offering to the Lord of the fruit of the ground. 4 Abel, on his part also brought of the firstlings of his flock and of their fat portions. And the Lord had regard for Abel and for his offering; 5 but for Cain and for his offering He had no regard. So Cain became very angry and his countenance fell. 6 Then the Lord said to Cain, "Why are you angry? And why has your countenance fallen? 7 If you do well, will not your countenance be lifted up? And if you do not do well, sin is crouching at the door; and its desire is for you, but you must master it."