Say at least three times:
سُبْحَانَ رَبِّيَ الْأَعْلَى وَبِحَمْدِهِ
Pronunciation
Subhaana Rabbiyal-A'laa wa bihamdihi
Meaning
Glory and praise be to my most high Lord.
Source: Hasan Sanad (Shu'aib Al-Arnaut). Abu Dawud: 870
Read the hadith
حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا اللَّيْثُ، - يَعْنِي ابْنَ سَعْدٍ - عَنْ أَيُّوبَ بْنِ مُوسَى، - أَوْ مُوسَى بْنِ أَيُّوبَ - عَنْ رَجُلٍ، مِنْ قَوْمِهِ عَنْ عُقْبَةَ بْنِ عَامِرٍ، بِمَعْنَاهُ زَادَ قَالَ فَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا رَكَعَ قَالَ " سُبْحَانَ رَبِّيَ الْعَظِيمِ وَبِحَمْدِهِ " . ثَلاَثًا وَإِذَا سَجَدَ قَالَ " سُبْحَانَ رَبِّيَ الأَعْلَى وَبِحَمْدِهِ " . ثَلاَثًا . قَالَ أَبُو دَاوُدَ وَهَذِهِ الزِّيَادَةُ نَخَافُ أَنْ لاَ تَكُونَ مَحْفُوظَةً . قَالَ أَبُو دَاوُدَ انْفَرَدَ أَهْلُ مِصْرَ بِإِسْنَادِ هَذَيْنِ الْحَدِيثَيْنِ حَدِيثِ الرَّبِيعِ وَحَدِيثِ أَحْمَدَ بْنِ يُونُسَ .
Narrated Uqbah ibn Amir: The above (No 868) tradition has also been reported through a different chain of narrators by Uqbah ibn Amir to the same effect. This version adds: When the Messenger of Allah (ﷺ) bowed, he said: "Glory and praise be to my mighty Lord" three times, and when he prostrated himself, he said: "Glory and praise be to my most high Lord" three times. Abu Dawud said: We are afraid the addition of the word "praise" is not guarded. [Hasan Sanad (Shu'aib Al-Arnaut). Abu Dawud: 870]
Duas from IslamicAPI's Masnun Dua dataset (based on the Quran, hadith, Hisnul Muslim and Rahe Belayat). See the dataset