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 .‏ [1]‏