Subḥāna Rabbiyal-`Aẓīm.
Glory to my Lord the Exalted (three times in Arabic)
Reference:
Abu Dawud, Ibn Majah, An-Nasa'i, At-Tirmidhi, and Ahmad. See Al-Albani's Sahih At-Tirmidhi 1/83.
Hisnul Muslim 33
Abu Dawud, Ibn Majah, An-Nasa'i, At-Tirmidhi, and Ahmad. See Al-Albani's Sahih At-Tirmidhi 1/83.
Hisnul Muslim 33