Numbers 31:1-6

1The Lord spoke to Moses:

2“Exact vengeance for the Israelites on the Midianites – after that you will be gathered to your people.”

3So Moses spoke to the people: “Arm men from among you for the war, to attack the Midianites and to execute the Lord’s vengeance on Midian.

4You must send to the battle a thousand men from every tribe throughout all the tribes of Israel.”

5So a thousand from every tribe, twelve thousand armed for battle in all, were provided out of the thousands of Israel.

6So Moses sent them to the war, one thousand from every tribe, with Phinehas son of Eleazar the priest, who was in charge of the holy articles and the signal trumpets.