Genesis 6:15-16

English Standard Version

¹⁵ This is how you are to make it: the length of the ark 300 cubits,^[a] its breadth 50 cubits, and its height 30 cubits. ¹⁶ Make a roof^[b] 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.