Not graded
Sahih Muslim intro-70
وَحَدَّثَنِي سَلَمَةُ بْنُ شَبِيبٍ، حَدَّثَنَا الْحُمَيْدِيُّ، حَدَّثَنَا سُفْيَانُ، قَالَ سَمِعْتُ أَبَا مُوسَى، يَقُولُ حَدَّثَنَا عَمْرُو بْنُ عُبَيْدٍ، قَبْلَ أَنْ يُحْدِثَ، .
Salamah bin Shabīb narrated to me, al-Humaydī narrated to us, Sufyān narrated to us, he said I heard Abū Mūsā [Isrā’īl bin Mūsā al-Basrī] saying:
‘Amr bin Ubayd narrated to us before what happened’ [i.e. before he became Mu’tazilī].
Reported by Muslim (No. intro-70).