Deuteronomy 1:15

ואקח את ראשי שבטיכם SO I TOOK THE HEADS OF YOUR TRIBES — I took them by fine words: Happy are you! Over whom are you about to be appointed? Over the sons of Abraham, Isaac and Jacob — over the sons of people who are called God's brethren and friends, God's portion and inheritance and to whom is applied every other expression denoting affection (Sifrei Devarim 15:1; cf. Targum Jonathan). אנשים חכמים וידעים [AND I TOOK] MEN, WISE AND KNOWN — but understanding men I could not find (Nedarim 20b). This, too, was one of the seven qualifications which Jethro mentioned to Moses, but he found only three: men, i.e. righteous men, wise and known (Sifrei Devarim 15:2). ראשים עליכם [AND I MADE THEM] HEADS OVER YOU — i.e. that you should pay them respect — regard them as first in buying, first in selling, first in all matters of business — coming into the Synagogue and House of Study last and leave first (so that all should rise out of respect) (cf. Sifrei Devarim 15:3). שרי אלפים means, one officer who is appointed over one thousand. שרי מאות means, one who is appointed over one hundred. ושטרים AND COURT-OFFICERS — i.e., and also I appointed court-officers over you, לשבטיכם ACCORDING TO YOUR TRIBES — these are they who bind and flog with the lash at the bidding of the judges (cf. Sifrei Devarim 15:5).

So I took the chief of your tribes, wise men, and known, and made them heads over you, captains over thousands, and captains over hundreds, and captains over fifties, and captains over tens, and officers among your tribes.

וָאֶקַּ֞ח אֶת־רָאשֵׁ֣י שִׁבְטֵיכֶ֗ם אֲנָשִׁ֤ים חֲכָמִים֙ וִֽידֻעִ֔ים וָאֶתֵּ֥ן אוֹתָ֛ם רָאשִׁ֖ים עֲלֵיכֶ֑ם שָׂרֵ֨י אֲלָפִ֜ים וְשָׂרֵ֣י מֵא֗וֹת וְשָׂרֵ֤י חֲמִשִּׁים֙ וְשָׂרֵ֣י עֲשָׂרֹ֔ת וְשֹׁטְרִ֖ים לְשִׁבְטֵיכֶֽם׃