One day we were praying behind the Prophet (ﷺ). When he raised his head from bowing, he said, "Sami'Allah Huliman 'Hamidah" A man behind him said -

رَبَّنَا وَلَكَ الْحَمْدُ، حَمْدًا كَثِيْرًا طَيِّبًا مُبَارَكًا فِيهِ

Rabbanaa wa lakal-hamd, hamdan katheeran tayyiban mubaarakan feeh

Our Lord, praise is Yours, abundant, good and blessed praise. When the Prophet (ﷺ) completed the prayer, he asked, "Who has said these words?" The man replied, "I." The Prophet (ﷺ) said, "I saw over thirty angels competing to write it first."

Reference: Bukhari: 799