Genesis 6:15-17

15 Now this is how you shall make it: the length of the ark 300 cubits, its breadth 50 cubits, and its height 30 cubits.

16 You shall make a roof for the ark, and you shall finish it to within a cubit from the top. You shall put the door of the ark in its side. You shall make it with lower, second, and third stories.

17 [16] [1] Now I am about to bring the flood — water upon the land — to destroy all flesh in which is the spirit of life from under the sky. Everything that is on the land will perish.