"I prayed with the Messenger of Allah (ﷺ), and he bowed and said when bowing: 'Subhana Rabbial-azim (Glory be to my Lord Almighty).' And when prostrating: 'Subhana Rabbial-'Ala (Glory be to my Lord Most High).'"
Sunan an-Nasa'i Book 12, Hadith 18
← Previous Hadith "The Prophet (ﷺ) drew back the curtain when the people were in rows behind Abu Bakr, may Allah be pleased with him, and said: 'O people, there is nothing left of the features of Prophethood except a good dream that a Muslim sees or is seen by others for him.' Then he said: 'Verily, I have been forbidden from reciting the Qur'an when bowing or prostrating. As for bowing, glorify the Lord therein, and as for prostration, strive hard in supplication for it is more deserving of a response.'"

Sunan an-Nasa'i Book 12, Hadith 17 Next Hadith → "The Messenger of Allah (ﷺ) often used to say when bowing and prostrating: 'Subhanaka Rabbana wa bi Hamdika, Allahumm aghfirli (Glorfy and praise be to You, our Lord. O Allah, forgive me.).'"

Sunan an-Nasa'i Book 12, Hadith 19