مَعَ الدَّلِيلِ عَلَى أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَمْ يُرِدْ بِقَوْلِهِ: إِذَا قَالَ الْإِمَامُ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ، فَقُولُوا: رَبَّنَا لَكَ الْحَمْدُ أَنَّ الْإِمَامَ لَا يَجُوزُ لَهُ أَنْ يَزِيدَ بَعْدَ رَفْعِ الرَّأْسِ مِنَ الرُّكُوعِ عَلَى قَوْلِهِ: رَبَّنَا لَكَ الْحَمْدُ.
With this evidence that the statement of the Noble Prophet ﷺ: "When the Imam says 'Sami' Allahu liman hamidah', you should say 'Rabbana lakal hamd'"—by this, the Prophet ﷺ did not mean that after the Imam raises his head from bowing, he cannot recite anything more than 'Rabbana lakal hamd'.