Seth, in the Abrahamic religions, was the third son of Adam and Eve. According to the Hebrew Bible, he had two brothers: Cain and Abel. According to , Seth was born after Abel's murder by Cain, and Eve believed that God had appointed him as a replacement for Abel. He is the only other child of Adam and Eve named in the Bible.
According to the Book of Genesis, Seth was born when Adam was 130 years old (according to the Masoretic Text), or 230 years old (according to the Septuagint), "a son in his likeness and image". The genealogy is repeated at . states that Adam fathered "sons and daughters" before his death, aged 930 years. According to Genesis, Seth died at the age of 912 (that is, 14 years before Noah's birth). (2962 BC)
Seth figures in the pseudepigraphical texts of the Life of Adam and Eve (the Apocalypse of Moses). It recounts the lives of Adam and Eve from after their expulsion from the Garden of Eden to their deaths. While the surviving versions were composed from the early third to the fifth century, the literary units in the work are considered to be older and predominantly of Jewish origin. There is wide agreement that the original was composed in a Semitic language in the first century AD/CE. In the Greek versions, Seth and Eve travel to the doors of the Garden to beg for some oil of the Tree of Mercy (i.e. the Tree of Life). On the way, Seth is attacked and bitten by a wild beast, which goes away when ordered by Seth. Michael refuses to give them the oil at that time, but promises to give it at the end of time, when all flesh will be raised up, the delights of paradise will be given to the holy people and God will be in their midst. On their return, Adam says to Eve: "What hast thou done? Thou hast brought upon us great wrath which is death." (chapters 5–14) Later, only Seth can witness the taking-up of Adam at his funeral in a divine chariot, which deposits him in the Garden of Eden.
Genesis refers to Seth as the ancestor of Noah and hence the father of all mankind, all other humans having perished in the Great Flood.