ESV: You shall make it hollow, with boards. As it has been shown you on the mountain, so shall it be made.
NIV: Make the altar hollow, out of boards. It is to be made just as you were shown on the mountain.
NASB: You shall make it hollow with planks; as it was shown to you on the mountain, so they shall make it.
CSB: Construct the altar with boards so that it is hollow. They are to make it just as it was shown to you on the mountain.
NLT: The altar must be hollow, made from planks. Build it just as you were shown on the mountain.
KJV: Hollow with boards shalt thou make it: as it was shewed thee in the mount, so shall they make it.
NKJV: You shall make it hollow with boards; as it was shown you on the mountain, so shall they make it.