1 Kings 12:20

The tribe of Judah only] This accords with the words of Ahijah in 1 Kings 11:32 and if the remaining tribes that fell to Jeroboam are reckoned as ten (1 Kings 11:31) and not eleven, the explanation is to be found in the omission of Levi (as the priestly tribe) and in regarding Ephraim and Manasseh as constituting the single tribe of Joseph: cp. 1 Kings 11:28. But in 1 Kings 11:21; 1 Kings 11:23, Benjamin is joined with Judah as belonging to Rehoboam; and this, in large measure, was really the case, the frontier between the two kingdoms lying within that tribe. Simeon, too, by its position must have been practically absorbed by Judah.