Quran 7:90 from Surah Al-A'raaf on Divine Marvels.
وَقَالَ ٱلۡمَلَأُ ٱلَّذِينَ كَفَرُواْ مِن قَوۡمِهِۦ لَئِنِ ٱتَّبَعۡتُمۡ شُعَيۡبًا إِنَّكُمۡ إِذٗا لَّخَٰسِرُونَ
English translation: And said the chiefs (of) those who disbelieved among his people If you follow Shuaib indeed you then (will be) certainly losers
Transliteration: waqala al-mala-u alladhina kafaru min qawmihi la-ini ittaba'tum shu'ayban innakum idhan lakhasiruna