Surah 9

Surah 9:61

"(There are) some of them who hurt the prophet, and say, ‘He is all ears!’ Say: ‘Good ears for you! He believes in God and believes in the believers, and (he is) a mercy for those of you who believe. But those who hurt the messenger of God – for them (there is) a painful punishment.’"

This verse promises a painful punishment to those who hurt the messenger. This promise repeats in 33.57, which adds Allah’s curse in this world.

- from The Quran with Christian Commentary: A Guide to Understanding the Scripture of Islam