حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ خَالِدٍ، عَنْ أَبِي بِشْرٍ الْعَنْبَرِيِّ، عَنِ ابْنِ التَّلِبِّ، عَنْ أَبِيهِ، أَنَّ رَجُلاً، أَعْتَقَ نَصِيبًا لَهُ مِنْ مَمْلُوكٍ فَلَمْ يُضَمِّنْهُ النَّبِيُّ صلى الله عليه وسلم ‏.‏ قَالَ أَحْمَدُ إِنَّمَا هُوَ بِالتَّاءِ - يَعْنِي التَّلِبَّ - وَكَانَ شُعْبَةُ أَلْثَغَ لَمْ يُبَيِّنِ التَّاءَ مِنَ الثَّاءِ ‏.‏

Narrated ath-Thalabb: On the authority of his father: A man emancipated his share in a slave. The Prophet (PBUH) did not put the responsibility on him to emancipate the rest. Ahmad said: The name Ibn al-Thalabb is to be pronounced with a ta' (and not with tha). As Shu'bah could not pronounce ta, he said tha. Translation Not Available

Book Ref: Sunan Abi Dawud Book 31 Hadith 3948
Web Ref:  Sunan Abi Dawud Book 30 Hadith 3937