Knowledge (Kitab Al-Ilm)
Dawud :: Book 25 : Hadith 3640
Narrated Zayd ibn Thabit:
Al-Muttalib ibn Abdullah ibn Hantab said: Zayd ibn Thabit entered upon Mu'awiyah and asked him about a tradition. He ordered a man to write it. Zayd said: The Apostle of Allah (peace_be_upon_him) ordered us not to write any of his traditions. So he erased it.