When you start the Prayer (after Takbeer)

Subḥaanak -allaahumma wa biḥamdika, wa tabaara kas-muka wa ta‛aalaa jadduka wa laa ilaaha ghayruk

“How far from imperfections You are O Allah, and I praise You. Blessed be Your name, and lofty is Your position and none has the right to be worshipped except You”

Muslim 399; Abu Dawud 775