Sunan At-Tirmidhi
Hadith #243
Aishah narrated:""When the Prophet opened the Salat he would say: (Subhanaka Allahumma wa bihamdika wa tabarakasmuka, wa ta'ala jadduka wa la ilaha ghairuk)"" 'Glorious You are O Allah, and with Your praise, and blessed is Your Name, and exalted is Your majesty, and none has the right to be worshipped but You