Genesis 6:15-19

This is how you shall make it: the length of the ark shall be three hundred cubits, its width fifty cubits, and its height thirty cubits.

You shall make a window for the ark, and finish it to a cubit from the top; and put the door of the ark on the side; you shall make it with lower, second, and third decks.

Now behold, I Myself am bringing the flood of water upon the earth, to destroy all flesh in which there is the breath of life, from under heaven; everything that is on the earth shall perish.

But I will establish My covenant with you; and you shall enter the ark—you, your sons, your wife, and your sons’ wives with you.

And of every living thing of all flesh, you shall bring two of every kind into the ark, to keep them alive with you; they shall be male and female.