Parallel
Exodus 27:8
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
Hollow with boards shalt thou make it: as it was shewed (note: Heb. he shewed) thee in the mount, so shall they make it.
Construct the altar with boards so that it is hollow. It is to be made just as you were shown on the mountain.