וּפֶן־תִּשָּׂ֨א עֵינֶ֜יךָ הַשָּׁמַ֗יְמָה וְֽ֠רָאִיתָ אֶת־הַשֶּׁ֨מֶשׁ וְאֶת־הַיָּרֵ֜חַ וְאֶת־הַכּֽוֹכָבִ֗ים כֹּ֚ל צְבָ֣א הַשָּׁמַ֔יִם וְנִדַּחְתָּ֛ וְהִשְׁתַּחֲוִ֥יתָ לָהֶ֖ם וַעֲבַדְתָּ֑ם אֲשֶׁ֨ר חָלַ֜ק יְהוָ֤ה אֱלֹהֶ֙יךָ֙ אֹתָ֔ם לְכֹל֙ הָֽעַמִּ֔ים תַּ֖חַת כָּל־הַשָּׁמָֽיִם׃
und damit du deine Augen nicht zum Himmel erhebst und wenn du die Sonne und den Mond und die Sterne siehst, sogar das ganze Heer des Himmels, wirst du weggezogen und betest sie an und dienst ihnen, denen der HERR, dein Gott, zugeteilt hat alle Völker unter dem ganzen Himmel.
Rashi on Deuteronomy
ופן תשא עיניך AND LEST THOU LIFT UP THINE EYES to ponder on the matter, and to set your heart to go astray after them.
Sforno on Deuteronomy
חלק ה' אלוקיך אותם לכל העמים, He arranged for them to appear in a manner appropriate for the needs of each respective nation, according to their individual differences. This very fact proves how wrong those are who believe in the universe’s existence being the result of “the big bang,” i.e. forces, sources of energy, which operated without design, happenings which are totally random, haphazard. How could zodiac signs be of significance unless a superior intelligence had arranged for them? (compare Maimonides, Moreh Nevuchim 20,2 quoting Aristo.)
Rashbam on Deuteronomy
אשר חלק, in order to provide light. According to the principal meaning of the text the meaning is that these celestial bodies were put at the disposal of all nations to serve them. By doing so G’d wanted to show that He is not concerned about their competition as influences that could override His authority in the universe.