Quran 37:122 from Surah As-Saaffaat on Divine Marvels.
إِنَّهُمَا مِنۡ عِبَادِنَا ٱلۡمُؤۡمِنِينَ
English translation: Indeed both of them (were) of Our slaves believing
Transliteration: innahuma min ibadina al-mu'minina