Genesis 4:6-8

Young's Literal Translation

⁶ And Jehovah saith unto Cain, `Why hast thou displeasure? and why hath thy countenance fallen?

⁷ Is there not, if thou dost well, acceptance? and if thou dost not well, at the opening a sin-offering is crouching, and unto thee its desire, and thou rulest over it.'

⁸ And Cain saith unto Abel his brother, [`Let us go into the field;'] and it cometh to pass in their being in the field, that Cain riseth up against Abel his brother, and slayeth him.