Genesis 6:12-16

And God looked on the earth, and behold, it was corrupt; for humanity had corrupted its way upon the earth.

Then God said to Noah, “The end of humanity has come before Me; for the earth is filled with violence because of people; and behold, I am about to destroy them with the earth.

Make for yourself an ark of gopher wood; you shall make the ark with compartments, and cover it inside and out with pitch.

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.