Quran 36:21 from Surah Yaseen on Divine Marvels.
ٱتَّبِعُواْ مَن لَّا يَسۡـَٔلُكُمۡ أَجۡرٗا وَهُم مُّهۡتَدُونَ
English translation: Follow (those) who (do) not ask (of) you any payment and they (are) rightly guided
Transliteration: ittabi'u man la yasalukum ajran wahum muh'taduna