In the Hebrew Bible, the main narrative of Noah’s Ark appears in the Book of Genesis. The story runs mainly through Genesis chapters 6–9, covering the world’s violence, the building of the Ark, the flood, the birds, Noah’s departure, and the covenant afterward.
Genesis is the first book of both the Hebrew Bible and the Christian Old Testament. Its opening chapters contain stories about creation, Adam and Eve, Cain and Abel, early genealogies, and the flood. The Noah account is therefore part of a larger primeval history before the book turns to the ancestors of Israel.
Noah also appears elsewhere in the Bible and in later Jewish, Christian, and Islamic writings. References outside Genesis may summarize or reinterpret him, but Genesis contains the central Ark narrative and its detailed measurements. This is why “Genesis” is the most specific canonical answer when asking where the biblical Ark story is found.