(9) باب مَنْ طَلَبَ دَمَ امْرِئٍ بِغَيْرِ حَقٍّ
Narrated Ibn `Abbas:
The Prophet (ﷺ) said, "The most hated persons to Allah are three: (1) A person who deviates from the right conduct, i.e., an evil doer, in the Haram (sanctuaries of Mecca and Medina); (2) a person who seeks that the traditions of the Pre-lslamic Period of Ignorance, should remain in Islam (3) and a person who seeks to shed somebody's blood without any right."
Reference: Sahih al-Bukhari 6882
In-book reference: Book 87, Hadith 21
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 83, Hadith 21