Genesis 6:16

6:16 You shall make a roof in the ark, and to a cubit shall you finish it upward. You shall set the door of the ark in the side of it. You shall make it with lower, second, and third levels.
-World English Bible

Other Translation

6:16 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.
-King James Version