וְאַתָּ֣ה תֶחֱזֶ֣ה מִכָּל־הָ֠עָם אַנְשֵׁי־חַ֜יִל יִרְאֵ֧י אֱלֹהִ֛ים אַנְשֵׁ֥י אֱמֶ֖ת שֹׂ֣נְאֵי בָ֑צַע וְשַׂמְתָּ֣ עֲלֵהֶ֗ם שָׂרֵ֤י אֲלָפִים֙ שָׂרֵ֣י מֵא֔וֹת שָׂרֵ֥י חֲמִשִּׁ֖ים וְשָׂרֵ֥י עֲשָׂרֹֽת׃
Ale chciej upatrzyć z całego ludu, mężów dzielnych, bogobojnych, mężów prawdy, nienawidzących korzyści, a tych ustanowisz nad nimi jako tysiączników, setników, pięćdziesiątników i dziesiętników.
Rashi
ואתה תחזה MOREOVER THOU SHALT PROVIDE through the Holy Spirit that is upon thee (Mekhilta),
Chizkuni
אנשי חיל, “men who are mentally able to through the strength of their personalities to endure the people demand and not be cowed by their threats."
Da'at Zekenim
שרי אלפים, “chiefs over a thousand each.” In the chapter of the Talmud tractate Sanhedrin dealing with this chapter it is pointed out that there were 600 chiefs over a thousand each, 6000 chiefs over 100 each and 60000 over each group of 10 Israelites plus 12000 over each group of 50 Israelites. If that had been so, there were no 600000 privates left in that army. We would have to assume therefore that Moses started with appointing 60000 potential chiefs. Having done so, he proceeded step by step to appoint the most capable of them to become either chiefs over 50, or over 1o00, or over 1000 each. As to the statement in the Talmud there that there were a total of 78600 chiefs of different ranks, this number applied to the people appointed as judges. Alternately, whereas the active soldiers were all of the ages between 20 and years of age, the officers over 50, 100, and 1000, respectively, could have been over 60 years of age.