וְאֶת־כָּל־חֵילָ֤ם וְאֶת־כָּל־טַפָּם֙ וְאֶת־נְשֵׁיהֶ֔ם שָׁב֖וּ וַיָּבֹ֑זּוּ וְאֵ֖ת כָּל־אֲשֶׁ֥ר בַּבָּֽיִת׃
Y toda su hacienda; se llevaron cautivos á todos sus niños y sus mujeres, y robaron todo lo que había en casa.
Rashi
חילם means THEIR WEALTH. Examples are: (Deuteronomy 8:17) “hath gotten me this (חיל) wealth”; (Numbers 19:18) “and Israel acquireth (חיל) wealth”; (Psalms 49:11) “and they leave (חילם) their wealth to others”.
Siftei Chakhamim
From the term שבייה. The accent is, therefore, on the latter syllable. But if the accent was on the first syllable, like with קמו and שבו, the root would be שוב. Then it would mean “returning.”
Rashi
שבו has the meaning of taking captive (i.e. it is the Kal. perfect, 3rd pl. of the root שבה and means “they took captive”), and therefore it is accented on the last syllable (whereas שָׁבוּ, accented on the first syllable, is the same form of the verb שוב and means “they returned”).