Sunnah.com reference : Book 2, Hadith 182English translation : Book 2, Hadith 294Arabic reference : Book 2, Hadith 296
Narrated Abu Sa'id Al-Khudri (RA) Allah's Messenger (ﷺ) used to say while raising his head after bowing:
"Allahumma Rabbana lakal-hamdu mil'as-samawati wal-ardi, wa mil'a
ma shi'ta min shai'in ba'du, ahlaththana'i wal-majdi, ahaqqu ma qal-al'abdu, wa kulluna laka 'abdun. Allahumma la mani'a lima a'taita, wa la mu'tiya lima man'ata, wa la yanfa'u dhal-jaddi minka-l-jaddu (O Allah, our Rabb (Lord), to You is praise in all the heavens and all the earth, and all that You Will (to create) afterwards, O You, Who are worthy of praise and glory, the most worthy of what a slave says - and we are all Your slaves: no one can withhold what You give, or give what You withhold, and riches cannot avail a wealthy person against You."

[Reported by Muslim].
وَعَنْ أَبِي سَعِيدٍ اَلْخُدْرِيِّ ‏-‏-رَضِيَ اَللَّهُ عَنْهُ‏-‏- قَالَ : { كَانَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-إِذَا رَفَعَ رَأْسَهُ مِنْ اَلرُّكُوعِ قَالَ : " اَللَّهُمَّ رَبَّنَا لَكَ اَلْحَمْدُ مِلْءَ اَلسَّمَوَاتِ وَمِلْءَ اَلْأَرْضِ , وَمِلْءَ مَا شِئْتَ مِنْ شَيْءٍ بَعْدُ , أَهْلَ اَلثَّنَاءِ وَالْمَجْدِ , أَحَقُّ مَا قَالَ اَلْعَبْدُ ‏- وَكُلُّنَا لَكَ عَبْدٌ ‏- اَللَّهُمَّ لَا مَانِعَ لِمَا أَعْطَيْتَ , وَلَا مُعْطِيَ لِمَا مَنَعْتَ , وَلَا يَنْفَعُ ذَا اَلْجَدِّ مِنْكَ اَلْجَدُّ }  رَوَاهُ مُسْلِمٌ .‏  1‏‏1 ‏- صحيح .‏ رواه مسلم ( 477 )‏ .‏