The main Noah’s Ark story appears in the Book of Genesis.
The narrative begins with God’s decision to send a Flood, Noah’s instructions for building the Ark, the entry of Noah’s family and animals, the Flood itself, the recession of the waters, and the covenant afterward. These events occupy Genesis chapters 6 through 9.
Genesis is the first book of the Hebrew Bible and the Christian Old Testament. Its name comes from the Greek word for “origin” or “beginning,” while the Hebrew title is Bereshit, meaning “In the beginning.” The book includes creation stories, the ancestors of Israel, and several major covenant narratives.
Noah also appears in other biblical passages and in the Quran, but the detailed Ark account most readers mean is in Genesis. Exodus, Leviticus, and Deuteronomy contain other central traditions and laws, not the main Ark narrative.