Numbers 31:1-3 New International Version - UK (NIVUK)
Vengeance on the Midianites
31 The Lord said to Moses, 2 ‘Take vengeance on the Midianites for the Israelites. After that, you will be gathered to your people.’
3 So Moses said to the people, ‘Arm some of your men to go to war against the Midianites so that they may carry out the Lord’s vengeance on them.