וִהְיִ֤יתֶם לִי֙ קְדֹשִׁ֔ים כִּ֥י קָד֖וֹשׁ אֲנִ֣י יְהוָ֑ה וָאַבְדִּ֥ל אֶתְכֶ֛ם מִן־הָֽעַמִּ֖ים לִהְי֥וֹת לִֽי׃
Soyez saints pour moi, car je suis saint, moi l’Éternel, et je vous ai séparés d’avec les peuples pour que vous soyez à moi.
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).