John Gill Commentary Deuteronomy 3:7

"But all the cattle, and the spoil of the cities, we took for a prey unto ourselves." — Deuteronomy 3:7 (ASV)

But all the cattle, and the spoil of the cities
The oxen and sheep, camels and asses; their gold and silver, and the furniture of their houses; their stores of corn, and of other fruits of the earth, even all their substance of whatsoever kind:

we took for a prey to ourselves ;
made them their own property, and used them for their own profit and service, whereby they became greatly enriched.