وَمَا مُحَمَّدٌ إِلَّا رَسُولٌ قَدْ خَلَتْ مِن قَبْلِهِ الرُّسُلُ ۚ أَفَإِن مَّاتَ أَوْ قُتِلَ انقَلَبْتُمْ عَلَىٰ أَعْقَابِكُمْ ۚ وَمَن يَنقَلِبْ عَلَىٰ عَقِبَيْهِ فَلَن يَضُرَّ اللَّهَ شَيْئًا ۗ وَسَيَجْزِي اللَّهُ الشَّاكِرِينَ
“Muhammad is no more than a Messenger; other Messengers have gone before him. If he were to die or to be killed, would you regress into disbelief? Those who do so will not harm Allah whatsoever. And Allah will reward those who are grateful.”
Recited by Abu Bakr RA to the Masjid on the day the Prophet ﷺ died; originally revealed at Uhud.