Genesis 4:6-8

Darby Translation

⁶ And Jehovah said to Cain, Why art thou angry, and why is thy countenance fallen?

⁷ If thou doest well, will not [thy countenance] look up [with confidence]? and if thou doest not well, sin lieth at the door; and unto thee [shall be] his desire, and thou shalt rule over him.

⁸ And Cain spoke to 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.