Exodus 31:9

And thou shalt make an altar of shittim wood, five cubits long, and five cubits broad; the altar shall be foursquare: and the height thereof shall be three cubits. And thou shalt make the horns of it upon the four corners thereof: his horns shall be of the same: and thou shalt overlay it with brass. And thou shalt make his pans to receive his ashes, and his shovels, and his basins, and his fleshhooks, and his firepans: all the vessels thereof thou shalt make of brass. And thou shalt make for it a grate of network of brass; and upon the net shalt thou make four brazen rings in the four corners thereof. And thou shalt put it under the compass of the altar beneath, that the net may be even to the midst of the altar. And thou shalt make staves for the altar, staves of shittim wood, and overlay them with brass. And the staves shall be put into the rings, and the staves shall be upon the two sides of the altar, to bear it. Hollow with boards shalt thou make it: as it was showed thee in the mount, so shall they make it.

And he made the altar of burnt offering of shittim wood: five cubits was the length thereof, and five cubits the breadth thereof; it was foursquare; and three cubits the height thereof. And he made the horns thereof on the four corners of it; the horns thereof were of the same: and he overlaid it with brass. And he made all the vessels of the altar, the pots, and the shovels, and the basins, and the fleshhooks, and the firepans: all the vessels thereof made he of brass. And he made for the altar a brazen grate of network under the compass thereof beneath unto the midst of it. And he cast four rings for the four ends of the grate of brass, to be places for the staves. And he made the staves of shittim wood, and overlaid them with brass. And he put the staves into the rings on the sides of the altar, to bear it withal; he made the altar hollow with boards.