54. Dua after Ruku (Rabana Lakal Hamdu)
Allah's Messenger (ﷺ) said, "When the Imam says, 'Sami'Allahu liman hamidah' you should say -
اَللَّهُمَّ رَبَّنَا وَلَكَ الْحَمْدُ
اَللّٰهُمَّ رَبَّنَا وَلَكَ الْحَمْدُ
Allaahumma Rabbanaa wa lakal-hamd
Translation
O Allah, our Lord and to You be the praise.
If the saying of any one of you coincides with that of the angels, all his past sins will be forgiven.