Sunan Ibn Majah — Establishing the Prayer and the Sunnah Regarding Them — Hadith No: 878
Translation
It was narrated that Ibn Abu Awfa said:“When the Messenger of Allah (ﷺ) raised his head from Ruku’, he said: ‘Sami’ Allahu liman hamidah, Allahumma, Rabbana lakal-hamd, mil’ as-samawati wa mil’ al- ard wa mil’ ma shi’ta min shay’in ba’d (Allah hears those who praise Him. O Allah! O our Lord, to You is the praise as much as fills the heavens, as much as fills the earth and as much as You will after that).’”