عَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَضَى أَنْ لَا يُقْتَلَ مُسْلِمٌ بِكَافِرٍ زَادَ فِي رِوَايَةٍ وَدِيَةُ الْكَافِرِ نِصْفُ دِيَةِ الْمُسْلِمِ
It is narrated from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) decreed that a Muslim will not be killed in retaliation for a disbeliever. In another narration: The blood money for a disbeliever is equal to half the blood money for a Muslim.