Exodus 27 8
Make the altar hollow, using boards, just as you were shown on the mountain.
Compare with other 3 random translations
AMP Exodus 27:8You shall make [the altar] hollow with slabs or planks; as shown you on the mountain, so shall it be made.
WEB Exodus 27:8You shall make it hollow with planks. They shall make it as it has been shown you on the mountain.
EAS Exodus 27:8Use boards to make the altar, so that it is empty inside. You must make it in the way that the Lord showed you on the mountain.