Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) said: "The blood money (diyah) of a mu'ahid (a non-Muslim under covenant) is half the blood money of a Muslim."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Nafi' except Ash'ath, no one narrated it from Ash'ath except al-Hasan bin Salih, and no one narrated it from al-Hasan except al-Nadr bin Abdullah, and Amir bin Ibrahim (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 7582
Hadith Gradingمحدثین:إسناده ضعيف لجهالة بعض رواته
Hadith Takhrij«قال الهيثمي: وفيه جماعة لم أعرفهم «مجمع الزوائد ومنبع الفوائد، ج 6، ص 299»»