Mukhtasar Bukhari (Abridged) 2172 — One who intends to shed innocent

Narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The three most evil persons in the sight of Allah Almighty are: (1) the one who commits injustice in the Haram of Makkah, (2) the one who, being a Muslim, wishes to follow the customs of ignorance, (3) the one who seeks to shed someone's blood unjustly."