Numbers 31:5

Amplified Bible

So out of the thousands of Israel, a thousand from each tribe were selected, twelve thousand armed for war.

Cross References

Numbers 31:4

A thousand [fighting men] from each tribe of all the tribes of Israel you shall send to the war.”

Numbers 31:6

Moses sent them, a thousand from each tribe, to the war, and Phinehas the son of Eleazar the priest, to war with them, and the sacred vessels [of the sanctuary] and the trumpets to blow the alarm in his hand.