At the start of the prayer (after takbeer)

سُبْـحانَكَ اللّهُـمَّ وَبِحَمْـدِكَ وَتَبارَكَ اسْمُـكَ وَتَعـالى جَـدُّكَ وَلا إِلهَ غَيْرُك

Glory is to You O Allah, and praise. Blessed is Your Name and Exalted is Your Majesty. There is none worthy of worship but You

Abu Dawud, Ibn Majah, An-Nasa'i, At-Tirmidhi. See Al-Albani, Sahih At-Tirmidhi 1/77 and Sahih Ibn Majah 1/135.