הִשָּׁ֣מֶר לְךָ֗ פֶּן־תִּנָּקֵשׁ֙ אַחֲרֵיהֶ֔ם אַחֲרֵ֖י הִשָּׁמְדָ֣ם מִפָּנֶ֑יךָ וּפֶן־תִּדְרֹ֨שׁ לֵֽאלֹהֵיהֶ֜ם לֵאמֹ֨ר אֵיכָ֨ה יַעַבְד֜וּ הַגּוֹיִ֤ם הָאֵ֙לֶּה֙ אֶת־אֱלֹ֣הֵיהֶ֔ם וְאֶעֱשֶׂה־כֵּ֖ן גַּם־אָֽנִי׃
take heed to thyself that thou be not ensnared to follow them, after that they are destroyed from before thee; and that thou inquire not after their gods, saying: ‘How used these nations to serve their gods? even so will I do likewise.’
Orchot Tzadikim
Pride can also be recognized in his food and drink, and in his wearing of proud garments — the garments of a heathen — and against this we are warned in the Torah of Moses, as it is said: "You shall not follow the practices of the nation …" (Lev. 20:23), and it is also written: "… Neither shall ye walk in their statues …" (Ibid. 18:3), and it is further said: "Take heed to thyself that thou be not ensnared to follow them …" (Deut. 12:30). All of these precepts concern one matter — warning that Israel should be distinguished from the nations in its garments, speech and customs, and thus it says: "… for I have set you apart from the peoples" (Lev. 20:26).