Ezekiel 43:15-16

So the altar {shall be} four cubits; and from the altar and upward {shall be} four horns. {the altar (first): Heb. Harel, that is, the mountain of God} {the altar (second): Heb. Ariel, that is, the lion of God} And the altar {shall be} twelve {cubits} long, twelve broad, square in the four squares thereof.