Cain (Hebrew, "Acquisition") was the firstborn son of Adam and Eve. He was a farmer; his brother Abel was a herdsman. When he brought some of his produce as an offering to God, God favored Abel's offering of sheep over Cain's offering of produce. Despite God's reminder that "If thou doest well, shalt thou not be accepted," Cain lured his brother out to a field where he killed him.
God responded by cursing Cain, saying, "A fugitive and a vagabond shalt thou be in the earth." Fearful of being killed in response to his murder of Abel, Cain fled to the land of Nod where he built a city that he named after his son Enoch. According to the apocryphal Book of Jubilees, Cain married his sister  Awan and was later killed when his house collapsed on him.