Genesis 6:16

6:16 Make a roof for the ark and finish it, leaving 18 inches ¹  from the top. ²  Put a door in the side of the ark, and make lower, middle, and upper decks.

[6:16]  ¹ tn Heb “a cubit.”

[6:16]  ² tn Heb “to a cubit you shall finish it from above.” The idea is that Noah was to leave an 18-inch opening from the top for a window for light.