The First Epistle of Clement to the Corinthians

For it is written thus:—And it came to pass[*](Examples of jealousy. Cain and Abel) after certain days that Cain offered to God a sacrifice of the fruits of the earth, and Abel himself also offered of the first-born of the sheep and of their fat.

And God looked on Abel and his gifts, but he had no respect to Cain and his sacrifices.

And Cain was greatly grieved and his countenance fell.

And God said to Cain, Why art thou grieved, and why is thy countenance fallen? If thou offeredst rightly, but didst not divide rightly, didst thou not sin?[*](This is unintelligible, and does not agree with the Hebrew, which is also unintelligible. It is dealt with at length in all commentaries on Genesis.)