It is narrated from Sayyiduna Abdullah bin Zubair (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever draws his sword and begins killing and slaughtering people, then his blood will be wasted (there will be neither retribution nor blood money for him)."
Hadith Referenceسلسله احاديث صحيحه / الحدود والمعاملات والاحكام / 1314