وَحَدَّثَنَا شَيْبَانُ بْنُ فَرُّوخَ، حَدَّثَنَا جَرِيرُ بْنُ حَازِمٍ، عَنْ نَافِعٍ، مَوْلَى عَبْدِ اللَّهِ بْنِ عُمَرَ عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ مَنْ أَعْتَقَ نَصِيبًا لَهُ فِي عَبْدٍ فَكَانَ لَهُ مِنَ الْمَالِ قَدْرُ مَا يَبْلُغُ قِيمَتَهُ قُوِّمَ عَلَيْهِ قِيمَةَ عَدْلٍ وَإِلاَّ فَقَدْ عَتَقَ مِنْهُ مَا عَتَقَ ‏"‏ ‏.‏

'Abdullah b. 'Umar reported Allah's Messenger (PBUH) as saying: He who gives up his share in a slave, and he has money enough to meet the full price, a fair price for him should be fixed; otherwise be has emancipated him to the extent that he has emancipated. Translation Not Available

Book Ref: Sahih Muslim Book 27 Hadith 4104
Web Ref:  Sahih Muslim Book 15 Hadith 1501 e