Abd Allah bin Abd ar-Rahman ad-Dārimī narrated to us, Zakariyyā’ bin Adī informed us, he said, Abū Ishāq al-Fazarī said to me: ‘Write from Baqiyyah what he transmits on authority of those who are well-known, and do not write from him what he transmits on authority of those who are not; do not write from Ismā’īl bin Ayyāsh what he transmits on authority of those who are well-known or otherwise ’.