13
And these are the measures of the altar by the cubit of a cubit and a span, the cavity a cubit deep, and a cubit shall be the breadth, and the border on the rim of it round about shall be a span: and this the height of the altar
14
from the bottom at the commencement of the hollow part to this great mercy-seat, from beneath was two cubits, and the breadth was a cubit; and from the little mercy-seat to the great mercy-seat, four cubits, and the breadth was a cubit.
15
And the altar four cubits; and from the altar and above the horns a cubit.
16
And the altar of the length of twelve cubits, by twelve cubits , square upon its four sides.
17
And the mercy-seat fourteen cubits in length, by fourteen cubits in breadth on its four sides; and a border to it carried round about it of half a cubit; and the rim of it a cubit round about; and the steps thereof looking eastward.
The Brenton translation of the Septuagint is in the public domain.