Sahih Muslim: Introduction, Hadith 84

Abū Ja’far ad-Dārimī narrated to us, Bishr bin Umar narrated to us, he said: ‘I asked Mālik bin Anas about Muhammad bin Abd ar-Rahman who transmits on authority of Sa’īd bin al-Musayyib, so he said: ‘He is not trustworthy ‘. I asked him about Sālih, a freed slave of at-Taw’amah, then he said: ‘He is not trustworthy’. I asked him about Abūl-Huwayrith , and he said: ‘He is not trustworthy’. I asked him about Shu’bah on whose authority Ibn Abī Dhi’b transmitted, and he said: ‘He is not trustworthy’. I asked him about Harām bin Uthmān , and he said ‘He is not trustworthy’. I asked Mālik about these five and he said: ‘They are not trustworthy in terms of their Ḥadīth’. I asked him about another man whose name I forget just now, and he said: ‘Did you see him in my book?’ I said: ‘No’. he said: ‘If he was trustworthy you would see him in my book’.