Exodus 38

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 basons, and the fleshhooks, and the firepans: all the vessels thereof made he of brass.

And he made for the altar a brasen 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.