Exodus 27:2

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 .

Make a horn at each of the four corners, so that the horns and the altar are of one piece, and overlay the altar with bronze.

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.