Sahih Muslim #81 · Introduction

Sahih MuslimIshāq bin Ibrāhīm al-Hanthalī [bin Rāhwayh] narrated to us
Sahih Muslim · Introduction
Sahih Muslim · مقدمة
‘What an excellent man is Baqiyyah, if it were not for the fact that he would provide a nickname for [those who were better-known by] the birth name, and he would provide the birth name for [those who were better-known by] a nickname. For a long time he would narrated to us on authority of Abī Sa’īd al-Wuhāthī, then when we investigated [we were surprised that] he was Abd ul-Quddūs ’.
وَحَدَّثَنِي أَحْمَدُ بْنُ يُوسُفَ الأَزْدِيُّ، قَالَ سَمِعْتُ عَبْدَ الرَّزَّاقِ، يَقُولُ مَا رَأَيْتُ ابْنَ الْمُبَارَكِ يُفْصِحُ بِقَوْلِهِ كَذَّابٌ إِلاَّ لِعَبْدِ الْقُدُّوسِ فَإِنِّي سَمِعْتُهُ يَقُولُ لَهُ كَذَّابٌ ‏.‏
Reference : Sahih Muslim 81