Berean Standard Bible
1 Kings 12:21
“And when Rehoboam arrived in Jerusalem, he mobilized the whole house of Judah and the tribe of Benjamin—180,000 chosen warriors—to fight against the house of Israel and restore the kingdom to Rehoboam son of Solomon.”

In context
19So to this day Israel has been in rebellion against the house of David.
21And when Rehoboam arrived in Jerusalem, he mobilized the whole house of Judah and the tribe of Benjamin—180,000 chosen warriors—to fight against the house of Israel and restore the kingdom to Rehoboam son of Solomon.
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Berean Standard Bible · A modern, readable English translation. Public domain (CC0).