It is narrated from Sayyiduna Abu Shurayh that the Prophet (peace and blessings be upon him) said: Among all people, the most rebellious in the sight of Allah are three types of people: 1. The one who kills someone in the Haram (sanctuary). 2. The one who kills someone other than his own killer. 3. The one who seeks retribution for blood from the time of ignorance. And by Allah, I will surely pay the blood money for the person whom you have killed. Thus, the Prophet (peace and blessings be upon him) paid his blood money.