According to Abrahamic tradition, Noah's Ark was a vessel built at God's command to save Noah, his family, and a core stock of the world's animals from the Great Flood. The story is contained in the Hebrew Bible, Christian Old Testament's Book of Genesis, chapters 6 to 9 and in the Quran.
According to the documentary hypothesis, the Ark story told in Genesis may represent several originally quasi-independent sources, and the process of composition over many centuries may help to explain apparent confusion and repetition in the text. Many Orthodox Jews and Christians reject this hypothesis, holding that the Ark story is true, that it has a single author, and that any perceived inadequacies can be explained rationally.
The Ark story told in Genesis has parallels in the Sumerian myth of Ziusudra, which tells how Ziusudra was warned by the gods to build a vessel in which to escape a flood which would destroy mankind. Less exact parallels are found in other cultures from around the world. Indeed, the deluge story is one of the most common folk stories throughout the world.