Quran 7:193 from Surah Al-A'raaf on Divine Marvels.
وَإِن تَدۡعُوهُمۡ إِلَى ٱلۡهُدَىٰ لَا يَتَّبِعُوكُمۡۚ سَوَآءٌ عَلَيۡكُمۡ أَدَعَوۡتُمُوهُمۡ أَمۡ أَنتُمۡ صَٰمِتُونَ
English translation: And if you call them to the guidance not will they follow you (It is) same for you whether you call them or you remain silent
Transliteration: wa-in tad'uhum ila al-huda la yattabi'ukum sawaon alaykum ada'awtumuhum am antum samituna