أَخْبَرَنَا نُوحُ بْنُ حَبِيبٍ، قَالَ أَنْبَأَنَا عَبْدُ الرَّزَّاقِ، قَالَ أَنْبَأَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمٍ، عَنْ أَبِيهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ ‏"‏ مَنْ أَعْتَقَ شِرْكًا لَهُ فِي عَبْدٍ أُتِمَّ مَا بَقِيَ فِي مَالِهِ إِنْ كَانَ لَهُ مَالٌ يَبْلُغُ ثَمَنَ الْعَبْدِ ‏"‏ ‏.‏

It was narrated from Salim, from his father, that the Messenger of Allah said: "Whoever sets free his share of a slave should set him free completely from his own wealth, if he has enough wealth to cover the price of the slave." Translation Not Available

Book Ref: Sunan An Nisai Book 44 Hadith 4698
Web Ref:  Sunan An Nisai Vol 5 Book 44 Hadith 4702