Al-Wala' (Right of inheritance) belongs to the one who manumits the slave
وَحَدَّثَنَاهُ أَحْمَدُ بْنُ عُثْمَانَ النَّوْفَلِيُّ، حَدَّثَنَا أَبُو دَاوُدَ، حَدَّثَنَا شُعْبَةُ، بِهَذَا الإِسْنَادِ نَحْوَهُ .
This hadith has been narrated on the authority of Shu'ba with the same chain of transmitters.