Muhammad was no more than a messenger like the messengers before him. Should he die or get killed, would you turn back on your heels? Anyone who turns back on his heels, does not hurt God in the least. God rewards those who are appreciative.
وَما مُحَمَّدٌ إِلّا رَسولٌ قَد خَلَت مِن قَبلِهِ الرُّسُلُ أَفَإِي۟ن ماتَ أَو قُتِلَ انقَلَبتُم عَلىٰ أَعقٰبِكُم وَمَن يَنقَلِب عَلىٰ عَقِبَيهِ فَلَن يَضُرَّ اللَّهَ شَيـًٔا وَسَيَجزِى اللَّهُ الشّٰكِرينَ
wa maa Muhammadun illaa Rasoolun qad khalat min qablihir Rusul; afa’im maata aw qutilan qalabtum ‘alaaa a’qaabikum; wa mai yanqalib ‘alaa aqibaihi falai yadurral laaha shai’aa; wa sayajzil laahush shaakireen