وَما مُحَمَّدٌ إِلّا رَسولٌ قَد خَلَت مِن قَبلِهِ الرُّسُلُ ۚ أَفَإِن ماتَ أَو قُتِلَ انقَلَبتُم عَلىٰ أَعقابِكُم ۚ وَمَن يَنقَلِب عَلىٰ عَقِبَيهِ فَلَن يَضُرَّ اللَّهَ شَيئًا ۗ وَسَيَجزِي اللَّهُ الشّاكِرينَ

Muhammad is only a messenger. Numerous messengers have preceded him. If he were to die or be killed, would you then turn back on your heels? Those who turn back won’t harm God in the least. God will reward the grateful.