كتاب العلم
Read the English translation first, with the original Arabic directly underneath.
Narrated Abdullah ibn Amr ibn al-'As:
I used to write everything which I heard from the Messenger of Allah (ﷺ). I intended (by it) to memorise it. The Quraysh prohibited me saying: Do you write everything that you hear from him while the Messenger of Allah (ﷺ) is a human being: he speaks in anger and pleasure? So I stopped writing, and mentioned it to the Messenger of Allah (ﷺ). He signalled with his finger to him mouth and said: Write, by Him in Whose hand my soul lies, only right comes out from it.
اكْتُبْ فَوَالَّذِي نَفْسِي بِيَدِهِ مَا يَخْرُجُ مِنْهُ إِلاَّ حَقٌّ