Genesis 6:15-16; Genesis 7:20

Genesis 6:15-16

15 And this is the fashion which thou shalt make it of: The length of the ark shall be three hundred cubits, the breadth of it fifty cubits, and the height of it thirty cubits.

16 A window shalt thou make to the ark, and in a cubit shalt thou finish it above; and the door of the ark shalt thou set in the side thereof; with lower, second, and third stories shalt thou make it.

Genesis 7:20

20 Fifteen cubits upward did the waters prevail; and the mountains were covered.