´It was narrated from Ibn 'Abbas that:` the Prophet of Allah ruled that the Diyah for a Mukatab should be (equivalent) to the Diyah for a free man, proportionate to the amount he had paid off (toward buying his freedom).
Hadith ReferenceSunan an-Nasa'i / The Book of Oaths (qasamah), Retaliation and Blood Money / Hadith: 4813
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:ضعيف، ضعيف، انظر الحديث السابق (4812) انوار الصحيفه، صفحه نمبر 357