Jami` at-Tirmidhi, Volume 3, Book 19, Hadith 1604 (DarusSalam) ⓘ

Narrated Qais bin Abu Hazim: From Jarir bin 'Abdullah that the Messenger of Allah sent a military expedition to Khath'am. So some people (living there) sought safety by prostrating, but they were met quickly and killed. News of this reached the Prophet upon which he commanded that they be given half of the 'Aql (blood money). And he said: "I am free from every Muslim that lives among the idolaters." They said:"O Messenger of Allah: How is that ?" He said: "They should not see each other's campfires."

حَدَّثَنَا هَنَّادٌ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنْ إِسْمَاعِيلَ بْنِ أَبِي خَالِدٍ، عَنْ قَيْسِ بْنِ أَبِي حَازِمٍ، عَنْ جَرِيرِ بْنِ عَبْدِ اللَّهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم بَعَثَ سَرِيَّةً إِلَى خَثْعَمٍ فَاعْتَصَمَ نَاسٌ بِالسُّجُودِ فَأَسْرَعَ فِيهِمُ الْقَتْلُ فَبَلَغَ ذَلِكَ النَّبِيَّ صلى الله عليه وسلم فَأَمَرَ لَهُمْ بِنِصْفِ الْعَقْلِ وَقَالَ ‏"‏ أَنَا بَرِيءٌ مِنْ كُلِّ مُسْلِمٍ يُقِيمُ بَيْنَ أَظْهُرِ الْمُشْرِكِينَ ‏"‏ ‏.‏ قَالُوا يَا رَسُولَ اللَّهِ وَلِمَ قَالَ ‏"‏ لاَ تَرَايَا نَارَاهُمَا ‏"‏ ‏.‏