Sunan an-Nasa'i #4808 · The Book of Oaths (qasamah), Retaliation and Blood Money

Sunan an-Nasa'iIt was narrated that Ibn 'Abbas said
Sunan an-Nasa'i · Book 45 · The Book of Oaths (qasamah), Retaliation and Blood Money
Sunan an-Nasa'i · كتاب 45 · كتاب الأيمان والقصاص والدية
"The Messenger of Allah ruled that the Diyah for a Mukatab who is killed should be (equivalent) to the Diyah for a free mand, proportionate to the amount be had paid off (toward buying his freedom)
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنَا وَكِيعٌ، قَالَ حَدَّثَنَا عَلِيُّ بْنُ الْمُبَارَكِ، عَنْ يَحْيَى، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَضَى رَسُولُ اللَّهِ صلى الله عليه وسلم فِي الْمُكَاتَبِ يُقْتَلُ بِدِيَةِ الْحُرِّ عَلَى قَدْرِ مَا أَدَّى ‏.‏
Reference : Sunan an-Nasa'i 4808In-book reference : Book 45, Hadith 103