Genesis 6:14-16
Make thee an ark of gopher wood; rooms shalt thou make in the ark, and shalt pitch it within and without with pitch.
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.
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.