8 Make the altar hollow, out of boards. It is to be made just as you were shown on the mountain.

Read Exodus 27:8 Using Other Translations

Hollow with boards shalt thou make it: as it was shewed thee in the mount, so shall they make it.
You shall make it hollow, with boards. As it has been shown you on the mountain, so shall it be made.
The altar must be hollow, made from planks. Build it just as you were shown on the mountain.