Ishāq bin Ibrāhīm al-Hanthalī [bin Rāhwayh] narrated to us, he said, I heard one of the companions of Abd Allah [bin al-Mubārak] say, Ibn al-Mubārak said:
‘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 ’.

وَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ الْحَنْظَلِيُّ، قَالَ سَمِعْتُ بَعْضَ، أَصْحَابِ عَبْدِ اللَّهِ قَالَ قَالَ ابْنُ الْمُبَارَكِ نِعْمَ الرَّجُلُ بَقِيَّةُ لَوْلاَ أَنَّهُ كَانَ يَكْنِي الأَسَامِيَ وَيُسَمِّي الْكُنَى كَانَ دَهْرًا يُحَدِّثُنَا عَنْ أَبِي سَعِيدٍ الْوُحَاظِيِّ فَنَظَرْنَا فَإِذَا هُوَ عَبْدُ الْقُدُّوسِ .