The tradition mentioned above by Rawh b. 'Ubadah from Sa'id b. Abu 'Arubah. In this version he did not mention the words "the slave should be required to work." If has also been transmitted by Jarir b. Hazim and Musa b. Khalaf from Qatadah through the chain of Yazid b. Zurai' and to the same effect. In this version they mentioned the words "the slave should be required to work"
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا يَحْيَى، وَابْنُ أَبِي عَدِيٍّ، عَنْ سَعِيدٍ، بِإِسْنَادِهِ وَمَعْنَاهُ . قَالَ أَبُو دَاوُدَ وَرَوَاهُ رَوْحُ بْنُ عُبَادَةَ عَنْ سَعِيدِ بْنِ أَبِي عَرُوبَةَ، لَمْ يَذْكُرِ السِّعَايَةَ وَرَوَاهُ جَرِيرُ بْنُ حَازِمٍ وَمُوسَى بْنُ خَلَفٍ جَمِيعًا عَنْ قَتَادَةَ، بِإِسْنَادِ يَزِيدَ بْنِ زُرَيْعٍ وَمَعْنَاهُ وَذَكَرَا فِيهِ السِّعَايَةَ .
AbuDaud
The Book of Manumission of Slaves • Hadith 3939