Quran 68:51 — The Pen (Al-Qalam)

وَإِن يَكادُ الَّذينَ كَفَروا لَيُزلِقونَكَ بِأَبصٰرِهِم لَمّا سَمِعُوا الذِّكرَ وَيَقولونَ إِنَّهُ لَمَجنونٌ

Those who disbelieved show their ridicule in their eyes when they hear the message and say, "He is crazy!"

[68:50] But his Lord blessed him, and made him righteous.

[68:52] It is in fact a message to the world.