Judges 7:16
And he divided the three hundred men into three companies, and he put a trumpet in every man's hand, with empty pitchers, and lamps within the pitchers.
Torrey's Topical Textbook—AKJV

1 Samuel 11:11
And it was so on the morrow, that Saul put the people in three companies; and they came into the middle of the host in the morning watch, and slew the Ammonites until the heat of the day: and it came to pass, that they which remained were scattered, so that two of them were not left together.
Torrey's Topical Textbook—AKJV