"when ye hear the signs of Allah held in defiance and ridicule, ye are not to sit with them unless they turn to a different theme: if ye did, ye would be like them. For Allah will collect the hypocrites and those who defy faith – all in Hell." [Quran 4:140]
"Hold to forgiveness; command what is right; but turn away from the ignorant." [Quran 7:199]
"But they uttered blasphemy … if they repent, it will be best for them, but if they turn back, Allah will punish them." [Quran 9:47]
"Allah is with those who restrain themselves . . . ." [Quran 16: 128]
"Therefore be patient with what they say, and celebrate (constantly) the praises of thy Lord, before the rising of the sun, and before its setting; yea, celebrate them for part of the hours of the night, and at the sides of the day: that thou mayest have (spiritual) joy." [Quran 20:130]
"And the servants of Allah … are those who walked on the earth in humility, and when the ignorant address them, they say 'Peace'!" [Quran 25:63]
"And when they hear vain talk, they turn away therefrom and say: 'To us our deeds, and to you yours; peace be to you: we seek not the ignorant.'" [Quran 28: 55]
"Have patience with what they say, and leave them with noble (dignity)." [Quran 73:10]
"Tell those who believe, to forgive those who do not look forward to the Days of Allah. It is for Him to recompense (for good or ill) each People according to what they have earned." [Quran 45:14]
"Bear, then, with patience, all that they say, and celebrate the praises of thy Lord, before the rising of the sun and before (its) setting." [Quran 50:39]
The Quran speaks of punishment in relation only to those who make war and mischief in opposition to Allah and Muhammad:
The punishment of those who wage war against Allah and His Messenger, and strive with might and main for mischief through the land is: execution, or crucifixion, or the cutting off of hands and feet from opposite sides, or exile from the land: that is their disgrace in this world, and a heavy punishment is theirs in the Hereafter
—Quran 5:33
Blasphemy against Prophet Muhammad
The hadith and other writings suggest death is the proper punishment for someone who insults Muhammad.
Bollox as I said earlier