Genesis 4:7-9

American Standard Version

⁷ If thou doest well, shall it not be lifted up? and if thou doest not well, sin coucheth at the door; and unto thee shall be its desire; but do thou rule over it. ⁸ And Cain ^[a]told Abel his brother. And it came to pass, when they were in the field, that Cain rose up against Abel his brother, and slew him.

⁹ And Jehovah said unto Cain, Where is Abel thy brother? And he said, I know not: am I my brother’s keeper?