Genesis B, also known as The Later Genesis, is a passage of Old English poetry describing the Fall of Satan and the Fall of Man, translated from an Old Saxon poem known as the "Old Saxon Genesis". The passage known as "Genesis B" survives as an interpolation in a much longer Old English poem, the rest of which is known as "Genesis A", which gives an otherwise fairly faithful translation of the biblical Book of Genesis. "Genesis B" comprises lines 235-851 of the whole poem.