民数記 31:5

聖書日本語

5 そこでイスラエルの部族のうちから部族ごとに千人ずつを選び、一万二千人を得て、戦いのために武装させた。

Bible Verse Review
  from Treasury of Scripure Knowledge

Gill's Notes on the Bible

So they were delivered out of the thousands of Israel,....] Several thousands very probably offered themselves voluntarily to go to the war, or however were summoned together on this account, and out of them the following number was delivered of picked and chosen men:

a thousand [of every] tribe, twelve thousand armed for war; which was but a small number to go against so considerable a nation and people; but this was done to show that the war was of the Lord, he would fight the battle, and give them victory, it being the same to him to do it with few as with many; and to encourage the people of Israel to believe the Lord would give them success against their many and powerful enemies in the land of Canaan, on the borders of which they now were.

Barnes' Notes on the Bible

Were delivered - Or, “were told off.”