Cain and Abel
In the biblical Book of Genesis, Cain and Abel are the first two sons of Adam and Eve. Cain, the firstborn, was a farmer, and his brother Abel was a shepherd. The brothers made sacrifices to God, but God favored Abel's sacrifice instead of Cain's. Cain then murdered Abel, whereupon God punished Cain by condemning him to a life of wandering. Cain then dwelt in the land of Nod (נוֹד, 'wandering'), where he built a city and fathered the line of descendants beginning with Enoch.
In the Qur'an, Abel and Cain are known as Hābīl (Arabic: هابيل) and Qābīl (قابيل) respectively. The events of the story in the Qur'an are virtually the same as the Hebrew Bible narrative: Both the brothers were asked to offer up individual sacrifices to God; God accepted Abel's sacrifice and rejected Cain's; out of jealousy, Cain slew Abel – the first ever case of murder committed upon the Earth. In Islam, the story of Cain and Abel serves as an admonition against murder promoting sanctity of human life.