Quran 7:125 from Surah Al-A'raaf on Divine Marvels.
قَالُوٓاْ إِنَّآ إِلَىٰ رَبِّنَا مُنقَلِبُونَ
English translation: They said Indeed we to our Lord (will) return
Transliteration: qalu inna ila rabbina munqalibuna