It is narrated from Sayyiduna Uqbah bin Malik (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "To proceed: what is the matter with a man who kills a man while he is saying, 'I am a Muslim'?" The killer said: O Messenger of Allah, he only said it to seek refuge (to save his life). The Messenger of Allah (peace and blessings be upon him) did like this (gesturing with his hands), disliked what he said, and turned his blessed face away from him, then said: "Allah has refused me (any leniency on behalf of) whoever kills a Muslim; Allah has refused me (any leniency on behalf of) whoever kills a Muslim."