Sayyiduna Jarir bin Abdullah (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) sent a detachment towards the tribe of Khath'am. Some people sought protection by prostrating, but the men of the detachment hastened to kill them. When this reached the Prophet (peace and blessings be upon him), he (peace and blessings be upon him) ordered that half the blood money be paid and said: "I am free of responsibility for every Muslim who lives among the polytheists." They said: O Messenger of Allah! Why? He said: "Their two fires should not see each other."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18419