Allah says,

﴿وَيَقُولُونَ إِنَّهُ لَمَجْنُونٌ﴾

(and they say: "Verily, he is a madman!'') meaning, they cut at him with their eyes and attack him with their tongues saying, "Verily, he is a madman.'' They say this because he came with the Qur'an. Allah then says,

﴿وَمَا هُوَ إِلاَّ ذِكْرٌ لِّلْعَالَمِينَ ﴾

(But it is nothing else but a Reminder to all the creatures (`Alamin).) This is the end of the explanation (Tafsir) of Surah Nun (or Al-Qalam), and all praise and blessing belong to Allah.