Exodus 30:2
It is to be square, a cubit long, a cubit wide, and two cubits high. Its horns must be of one piece.
Berean Standard Bible
A cubit shall be the length thereof, and a cubit the breadth thereof; foursquare shall it be: and two cubits shall be the height thereof: the horns thereof shall be of the same.
Its length shall be a cubit, and its width a cubit. It shall be square, and its height shall be two cubits. Its horns shall be of one piece with it.