It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that he said: "O Messenger of Allah, shall I write down everything I hear from you?" He (peace and blessings be upon him) said: "Yes." I said: "In a state of anger and in a state of contentment?" He (peace and blessings be upon him) said: "Yes, for it is not fitting for me to say anything but the truth." The student of the science of hadith should know that no one has ever criticised Amr bin Shu'ayb; Imam Muslim only spoke about whether Shu'ayb heard from his grandfather Abdullah bin Amr. But when this narration comes through Mujahid, it is sahih (authentic), and I have mentioned it as a supporting narration (shahid) for the hadith of Abd al-Wahid bin Qays.

It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both): I used to write down everything I heard from the Messenger of Allah (peace and blessings be upon him) in order to memorise it. Then Quraysh stopped me and said: "Do you write down everything you hear from the Messenger of Allah (peace and blessings be upon him), while the Messenger of Allah (peace and blessings be upon him) is a human being who speaks in (both states of) contentment and anger?" So I stopped and mentioned this to the Messenger of Allah (peace and blessings be upon him), and he (peace and blessings be upon him) said: "Write, for by the One in whose Hand is my soul, nothing but the truth has come out of it (this mouth)," and he (peace and blessings be upon him) pointed with his blessed hand to his blessed mouth. The two Shaykhs used all the narrators of this hadith as evidence except al-Walid, and I think he is al-Walid bin Abi al-Walid al-Shami; if so, Imam Muslim used him as evidence.

It is narrated from Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) that he said: "Secure (preserve) knowledge by writing." Likewise, this narration is also authentically reported from Sayyiduna Anas bin Malik (may Allah be pleased with him) as his own saying.