Deut 1:15

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

So I took the leaders of your tribes, wise and respected men, and appointed them as leaders over you—as commanders of thousands, of hundreds, of fifties, and of tens, and as officers for your tribes.