The Sufficient (Vol 7) · Hadith 742 (#Ḥadīth #19)
Chapter 19 | The Rare Ahadith
19- مُحَمَّدُ بْنُ يَحْيَى رَفَعَهُ عَنْ حَمَّادِ بْنِ عِيسَى عَنْ أَبِي عَبْدِ اللهِ أَنَّ أَمِيرَ الْمُؤْمِنِينَ أُتِيَ بِعَبْدٍ لِذِمِّيٍّ قَدْ أَسْلَمَ فَقَالَ اذْهَبُوا فَبِيعُوهُ مِنَ الْمُسْلِمِينَ وَادْفَعُوا ثَمَنَهُ إِلَى صَاحِبِهِ وَلا تُقِرُّوهُ عِنْدَهُ.
19. Muhammad ibn Yahya has narrated from in a marfu‘ manner from Hammad ibn ‘Isa who has narrated the following: Abu ‘Abd Allah , has said that a taxpayer slave who had become a Muslim was brought before Amir al-Mu’minin, Ali . He (the Imam) issued a judgment that said, ‘You (people of the state) must sell him to a Muslim and pay his price to his owner and do not leave him with him.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).