1 Kings 18:32

And with the stones he built an altar in the same of the Lord,
&c.] Whom the twelve tribes had formerly worshipped; and though now divided in their civil state, yet ought to be united in the worship of God:

and he made a trench about the altar, as great as would contain two
measures of seed;
or two seahs, one of which was the third part of an ephah, and two of them were more than half a bushel; and this trench or ditch round the altar was as broad as such a measure of seed would sow.