To shed somebody’s blood without any right

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."

حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي حُسَيْنٍ، حَدَّثَنَا نَافِعُ بْنُ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ النَّبِيَّ ﷺ قَالَ " أَبْغَضُ النَّاسِ إِلَى اللَّهِ ثَلاَثَةٌ مُلْحِدٌ فِي الْحَرَمِ، وَمُبْتَغٍ فِي الإِسْلاَمِ سُنَّةَ الْجَاهِلِيَّةِ، وَمُطَّلِبُ دَمِ امْرِئٍ بِغَيْرِ حَقٍّ لِيُهَرِيقَ دَمَهُ ".