Exodus 27:3

¹And thou shalt make an altar of incorruptible wood, of five cubits in the length, and five cubits in the breadth; the altar shall be square, and the height of it shall be of three cubits.

²And thou shalt make the horns on the four corners; the horns shall be of the same piece, and thou shalt overlay them with brass.

— Exodus 27:3 —

⁴And thou shalt make for it a brazen grate with network; and thou shalt make for the grate four brazen rings under the four sides.

⁵And thou shalt put them below under the grate of the altar, and the grate shall extend to the middle of the altar.