أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَزِيدُ، – وَهُوَ ابْنُ زُرَيْعٍ – قَالَ حَدَّثَنَا أَيُّوبُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏
"‏ مَنْ أَعْتَقَ شِرْكًا لَهُ فِي مَمْلُوكٍ وَكَانَ لَهُ مِنَ الْمَالِ مَا يَبْلُغُ ثَمَنَهُ بِقِيمَةِ الْعَبْدِ فَهُوَ عَتِيقٌ مِنْ مَالِهِ ‏"‏ ‏.‏

It was narrated that Ibn 'Umar said: "The Messenger of Allah said: 'Whoever sets free his share of a slave, and he has sufficient wealth to set him free completely by paying the price of the slave, then he should set him free with his own wealth."'