Quran 11:121 from Surah Hud on Divine Marvels.
وَقُل لِّلَّذِينَ لَا يُؤۡمِنُونَ ٱعۡمَلُواْ عَلَىٰ مَكَانَتِكُمۡ إِنَّا عَٰمِلُونَ
English translation: And say to those who (do) not believe Work (according) to your position indeed we (are also) working
Transliteration: waqul lilladhina la yu'minuna i'malu ala makanatikum inna amiluna