Numbers 10:4
But if they blow only one, the leaders, the heads of the thousands of Israel, will assemble to you.
Exodus 18:21
And you will select from all the people men of ability, fearers of God, trustworthy men, haters of [dishonest] gain, and you will appoint [such men] over them [as] commanders of thousands, commanders of hundreds, commanders of fifties, and commanders of tens.
Numbers 7:2
the leaders of Israel, the heads of {the families}, presented an offering; they [were] the leaders of the tribes and [were] the ones in charge of the counting.
Numbers 1:4-16
A man from each tribe will be with you, each man the head of {his family}.
Deuteronomy 1:15
And so I took the leaders of your tribes, wise and knowledgeable men, and [then] I appointed them as leaders over you [as] commanders of [groups of] thousands and commanders of [groups of] hundreds and commanders of [groups of] fifties and commanders of [groups of] tens [as] officials for your tribes.