'Slabs' in the Bible

You are to make the altar hollow with planks; as you were shown on the mountain [of Sinai], so shall it be made.

The double hooks, one hand width in length were installed in the house all around. The meat of the offering was [to be placed] on the tables.

having the golden altar of incense and the ark of the covenant covered entirely with gold. This contained a golden jar which held the manna, and the rod of Aaron that sprouted, and the [two stone] tablets of the covenant [inscribed with the Ten Commandments];