حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ حَدَّثَنَا هِشَامُ بْنُ أَبِي عَبْدِ اللَّهِ حَدَّثَنَا يَحْيَى بْنُ أَبِي كَثِيرٍ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُودَى الْمُكَاتَبُ بِقَدْرِ مَا أَدَّى دِيَةَ الْحُرِّ وَبِقَدْرِ مَا رَقَّ دِيَةَ الْعَبْدِ
مسند امام احمد بن حنبل · Hadith 2356
It was narrated that Ibn 'Abbas (RA) said: The Messenger of Allah (PBUH) said: "With regard to a 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 diycth of a slave should be paid, commensurate with the extent to which he was still a slave."
Sanad
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ حَدَّثَنَا هِشَامُ بْنُ أَبِي عَبْدِ اللَّهِ حَدَّثَنَا يَحْيَى بْنُ أَبِي كَثِيرٍ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ