Rashi on Numbers 31:42/רש"י על במדבר ל״א:מ״ב

1וממחצית בני ישראל אשר חצה משה AND OF THE CHILDREN OF ISRAEL’S HALF WHICH MOSES DIVIDED among the congregation and which he had taken for them, מן האנשים הצבאים FROM THE MEN THAT WARRED.