1 Kings 12:21

Rehoboam prepares to make war on Israel but this is forbidden by the Prophet Shemaiah (2 Chronicles 11:1-4)

21. all the house of Judah, with the tribe of Benjamin Called in 2 Chron. -the house of Judah and Benjamin." Thus Benjamin is shewn to have been, as it were, reckoned with Judah rather than as a separate tribe.

an hundred and fourscore thousand The LXX. gives the number as 120,000. Though apparently enormous, neither number is excessive when we recall Joab's numbering (2 Samuel 24:9), at which time the men of Judah were found to be 500,000. But subsistence for so large a population must have been very difficult to find in so small a state.