C. F. Keil and Franz Delitzsch on Judges 7:7

Jdg 7:7

After his fighting men had been divided into a small handful of 300 men on the one hand, and the large host of 9700 on the other, by the fulfilment of the command of God, the Lord required of him that he should send away the latter, “every man to his place,” i.e., to his own home, promising that He would save Israel by the 300 men, and deliver the Midianites into their hand. The promise preceded the command, to render it easier to Gideon to obey it. “All the people,” after taking out the 300 men, that is to say, the 9700 that remained.