Genesis 4:6-8

YLT(i) 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.