The Family Of Imran - 3:144
Muhammad is only a messenger and many messengers have come before him. If he dies or is killed, will you turn back? The apostates can do no harm to Allah. Allah will reward those who give thanks.
The messengers were human beings like us; what is important for us is the message they conveyed:
The Heights/7:75
"The arrogant elders of his people said to the believers whom they humiliated and persecuted, "How do you know that Salih is indeed sent from his Lord?"They said: "We believe in the message he has brought"."