Genesis 6:15-17

15 This is how you are to make it: the length of the ark 300 cubits, its breadth 50 cubits, and its height 30 cubits.

16 Make a roof for the ark, and finish it to a cubit above, and set the door of the ark in its side. Make it with lower, second, and third decks.

17 For behold, I will bring a flood of waters upon the earth to destroy all flesh in which is the breath of life under heaven. Everything that is on the earth shall die.