Musannaf Ibn Abi Shaybah 28120 — Those who permitted writing down

Yusuf bin Mahak said that Sayyiduna Abdullah bin Amr (may Allah be pleased with him) said: "I used to write down every hadith I heard from the Messenger of Allah (peace and blessings be upon him) so that I might remember it. Quraysh stopped me from doing this and said: 'You write down everything the Messenger of Allah (peace and blessings be upon him) says? Yet the Messenger of Allah (peace and blessings be upon him) is sometimes in a state of pleasure and sometimes in a state of anger!' He said: So I stopped writing, and I mentioned this to the Prophet (peace and blessings be upon him). He (peace and blessings be upon him) pointed to his tongue and said: 'Write, for by the One in whose Hand is my soul, nothing but the truth comes out of this tongue.'"