Cain is a Biblical figure in the Book of Genesis within Abrahamic religions. He is the elder brother of Abel, and the firstborn son of Adam and Eve, the first couple within the Bible. He was a farmer who gave an offering of his crops to God. God, however, was not pleased and favored Abel's offering over Cain's. Out of jealousy, Cain killed his brother, for which he was punished by God with the curse and mark of Cain. He had several children, starting with Enoch and including Lamech.
The narrative never explicitly states Cain's motive for murdering his brother, God's reason for rejecting Cain's sacrifice, or details on the identity of Cain's wife. Some traditional interpretations consider Cain to be the originator of evil, violence, or greed. According to Genesis, Cain was the first human born and the first murderer.