Charles Ellicott Commentary Judges 7:17

"And he said unto them, Look on me, and do likewise: and, behold, when I come to the outermost part of the camp, it shall be that, as I do, so shall ye do." — Judges 7:17 (ASV)

Look on me. —He showed all the three hundred the way in which he wished them, at a given signal, to break the pitchers, wave the torches, and shout. The signal would be given by the one hundred whom he himself headed.