Not graded
Sahih Muslim intro-34
وَحَدَّثَنَا عَمْرُو بْنُ عَلِيٍّ أَبُو حَفْصٍ، قَالَ سَمِعْتُ يَحْيَى بْنَ سَعِيدٍ، قَالَ سَأَلْتُ سُفْيَانَ الثَّوْرِيَّ وَشُعْبَةَ وَمَالِكًا وَابْنَ عُيَيْنَةَ عَنِ الرَّجُلِ لاَ يَكُونُ ثَبْتًا فِي الْحَدِيثِ فَيَأْتِينِي الرَّجُلُ فَيَسْأَلُنِي عَنْهُ . قَالُوا أَخْبِرْ عَنْهُ أَنَّهُ لَيْسَ بِثَبْتٍ .
Amr bin Alī Abū Hafs narrated to us, he said I heard Yahyā bin Sa’īd, he said:
‘I asked Sufyān ath-Thawrī , Shu’bah, Mālik, and Ibn Uyaynah about a man who is not reliable (Thabt) in Ḥadīth, and someone comes and asks me about him, and they said: ‘Inform [others] against him that he is not reliable’.’
Reported by Muslim (No. intro-34).