American Standard Version
Avenge the children of Israel of the Midianites: afterward shalt thou be gathered unto thy people.

Berean Study Bible
“Take vengeance on the Midianites for the Israelites. After that, you will be gathered to your people.”

Douay-Rheims Bible
Revenge first the children of Israel on the Madianites, and so thou shalt be gathered to thy people.

English Revised Version
Avenge the children of Israel of the Midianites: afterward shalt thou be gathered unto thy people.

King James Bible
Avenge the children of Israel of the Midianites: afterward shalt thou be gathered unto thy people.

World English Bible
"Avenge the children of Israel for the Midianites. Afterward you shall be gathered to your people."

Young's Literal Translation
'Execute the vengeance of the sons of Israel against the Midianites -- afterwards thou art gathered unto thy people.'

Numbers 31:2 Additional Translations ...