Sunan Abi Dawud Knowledge (Kitab Al-Ilm) al-Muttalib bin 'Abdullah bin Hantab المطلب بن عبد الله بن حنطب Kathir bin Zayd al-'Aslmy كثير بن زيد الأسلمي Muhammad bin 'Abdullah bin al-Zubair محمد بن عبد الله أبو أحمد الزبيري Nasr bin 'Ali bin Nasr bin 'Ali Sahih 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. https://parallelquran.com/hadith/sunan-abi-dawud-3646/