Narrated Abdullah ibn Abbas:

The Messenger of Allah (ﷺ) gave judgment about the slave who had made an agreement to purchase his freedom (mukatab) and he had been killed that blood-wit is paid for him at the rate paid for a free man so far as he has paid the purchase money, and at the rate paid for a slave as the remainder is concerned.

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، وَحَدَّثَنَا إِسْمَاعِيلُ، عَنْ هِشَامٍ، وَحَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا يَعْلَى بْنُ عُبَيْدٍ، حَدَّثَنَا حَجَّاجٌ الصَّوَّافُ، جَمِيعًا عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَضَى رَسُولُ اللَّهِ صلى الله عليه وسلم فِي دِيَةِ الْمُكَاتَبِ يُقْتَلُ يُودَى مَا أَدَّى مِنْ مُكَاتَبَتِهِ دِيَةَ الْحُرِّ وَمَا بَقِيَ دِيَةَ الْمَمْلُوكِ ‏.‏