Ibn Hanbal;
Zayd Ibn Thabit (The Prophet's closest revelation writer) visited the Khalifa Mu'aawiyah (more than 30 years after the Prophet's death), and told him a story about the Prophet. Mu'aawiyah liked the story and ordered someone to write it down. But Zayd said. " the messenger of God ordered us never to write anything of his hadith".
Ibn Hanbal in his Musnad book, narrates a hadith in which Abdullah Ibn Omar said, "the Messenger of God one day came out to us as if he was going to depart us soon and said, "When I depart you (die), hold to the book of God, prohibit what it prohibits and accept as halal what it makes halal."