Surah 6:10
"Certainly messengers have been mocked before you, but those of them who ridiculed (were) overwhelmed (by) what they were mocking."
6.10 – Certainly messengers have been mocked before you
The Quran directly addresses the messenger and seems to encourage him by citing the experiences of messengers in the past.
- from The Quran with Christian Commentary: A Guide to Understanding the Scripture of Islam