Numbers 10:4
"But if they blow with one trumpet, then the leaders, the heads of the thousands of Israel, must come to you.
Exodus 18:21
But you choose from the people capable men, God-fearing, men of truth, those who hate bribes, and put them over the people as rulers of thousands, rulers of hundreds, rulers of fifties, and rulers of tens.
Numbers 7:2
Then the leaders of Israel, the heads of their clans, made an offering. They were the leaders of the tribes; they were the ones who had been supervising the numbering.
Numbers 1:4-16
And to help you there is to be a man from each tribe, each man the head of his family.
Deuteronomy 1:15
So I chose as your tribal leaders wise and well-known men, placing them over you as administrators of groups of thousands, hundreds, fifties, and tens, and also as other tribal officials.