Quran 36:16 from Surah Yaseen on Divine Marvels.
قَالُواْ رَبُّنَا يَعۡلَمُ إِنَّآ إِلَيۡكُمۡ لَمُرۡسَلُونَ
English translation: They said Our Lord knows that we to you (are) surely Messengers
Transliteration: qalu rabbuna ya'lamu inna ilaykum lamur'saluna