حَدَّثَنَا إِسْمَاعِيلُ حَدَّثَنَا هِشَامٌ الدَّسْتُوَائِيُّ عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي الْمُكَاتَبِ يَعْتِقُ مِنْهُ بِقَدْرِ مَا أَدَّى دِيَةَ الْحُرِّ وَبِقَدْرِ مَا رَقَّ مِنْهُ دِيَةَ الْعَبْدِ
مسند امام احمد بن حنبل · Hadith 1984
It was narrated that Ibn 'Abbas said: The Messenger of Allah (PBUH) said with regard to the mukatab [a slave who has drawn up a contract of manumission with his master and is buying his freedom in instalments]: "A portion of the diyah of a free man should be paid, commensurate with how much he had paid towards his manumission, and a portion of the diyah of a slave should be paid, commensurate with the extent to which he was still a slave."
Sanad
حَدَّثَنَا إِسْمَاعِيلُ حَدَّثَنَا هِشَامٌ الدَّسْتُوَائِيُّ عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ