1 Kings 12:21

Overview - 1 Kings 12
1	The Israelites, assembled at Shechem to crown Rehoboam, by Jeroboam make a suit of relaxation unto him.
6	Rehoboam, refusing the old men's counsel, answers them roughly.
16	Ten tribes revolting, kill Adoram, and make Rehoboam flee.
21	Rehoboam, raising an army, is forbidden by Shemaiah.
25	Jeroboam strengthens himself by cities;
26	and by the idolatry of the two calves.

1 Kings 12:21  (King James Version)
And when Rehoboam was come to Jerusalem, he assembled all the house of Judah, with the tribe of Benjamin, an hundred and fourscore thousand chosen men, which were warriors, to fight against the house of Israel, to bring the kingdom again to Rehoboam the son of Solomon.