'Thousands' in the Bible

Solomon spoke to all Israel, to the commanders of thousands and of hundreds and to the judges and to every leader in all Israel, the heads of the fathers’ households.

This was their muster according to their fathers’ households: of Judah, commanders of thousands, Adnah was the commander, and with him 300,000 valiant warriors;

Moreover, Amaziah assembled Judah and appointed them according to their fathers’ households under commanders of thousands and commanders of hundreds throughout Judah and Benjamin; and he took a census of those from twenty years old and upward and found them to be 300,000 choice men, able to go to war and handle spear and shield.