Exodus 38:1-7

And he made the altar of burnt-offering of acacia wood: five cubits was the length thereof, and five cubits the breadth thereof, foursquare; and three cubits the height thereof. And he made the horns thereof upon the four corners of it; the horns thereof were of one piece with it: and he overlaid it with brass. And he made all the vessels of the altar, the pots, and the shovels, and the basins, the flesh-hooks, and the firepans: all the vessels thereof made he of brass. And he made for the altar a grating of network of brass, under the ledge round it beneath, reaching halfway up. And he cast four rings for the four ends of the grating of brass, to be places for the staves. And he made the staves of acacia wood, and overlaid them with brass. And he put the staves into the rings on the sides of the altar, wherewith to bear it; he made it hollow with planks.