Exodus 27:1-8 ESV
“You shall make the altar of acacia wood, five cubits long and five cubits broad. The altar shall be square, and its height shall be three cubits. And you shall make horns for it on its four corners; its horns shall be of one piece with it, and you shall overlay it with bronze. You shall make pots for it to receive its ashes, and shovels and basins and forks and fire pans. You shall make all its utensils of bronze. You shall also make for it a grating, a network of bronze, and on the net you shall make four bronze rings at its four corners. And you shall set it under the ledge of the altar so that the net extends halfway down the altar. And you shall make poles for the altar, poles of acacia wood, and overlay them with bronze. And the poles shall be put through the rings, so that the poles are on the two sides of the altar when it is carried. You shall make it hollow, with boards. As it has been shown you on the mountain, so shall it be made.