Genesis 6:16-18

16 You shall make a roof or [2]window [a place for light] for the ark and finish it to a cubit [at least 18 inches] above — and the [3]door of the ark you shall put in the side of it; and you shall make it with lower, second, and third stories.

17 For behold, I, even I, will bring a flood of waters upon the earth to destroy and make putrid all flesh under the heavens in which are the breath and spirit of life; everything that is on the land shall die.

18 But I will establish My covenant (promise, pledge) with you, and you shall come into the ark — you and your sons and your wife and your sons’ wives with you.