1 And when Rehoboam had come to Jerusalem, he gathered of the house of Judah and Benjamin a hundred and eighty thousand chosen men, which were warriors, to fight against Israel, that he might bring the kingdom again to Rehoboam.
2 Chronicles 11:1 Cross References - TKJU
1 Kings 12:21-24
21 And when Rehoboam had come to Jerusalem, he assembled all the house of Judah, with the tribe of Benjamin, a hundred and eighty thousand chosen men, which were warriors, to fight against the house of Israel, to bring the kingdom again to Rehoboam the son of Solomon.
22 But the word of God came to Shemaiah the man of God, saying,
23 speak to Rehoboam, the son of Solomon, king of Judah, and to all the house of Judah and Benjamin, and to the remnant of the people, saying,
24 thus says the LORD, You shall not go up, nor fight against your brothers the children of Israel: Return every man to his house; for this thing is from me.  They listened therefore to the word of the LORD, and returned to depart, according to the word of the LORD.
Psalms 33:10
10 The LORD brings the counsel of the heathen to nothing: He makes the devices of the people of no effect.
Psalms 33:16
16 There is no king saved by the multitude of an army: A mighty man is not delivered by much strength.