Abu Ghadiyah (may Allah be pleased with him) reports that when Ammar bin Yasir (may Allah be pleased with him) was martyred, Amr (may Allah be pleased with him) was informed of this. He said: I heard the Prophet (peace and blessings of Allah be upon him) say that the one who kills Ammar and the one who seizes his belongings will go to Hell. Someone said to Amr (may Allah be pleased with him): Were you not also fighting against him? He replied: The Prophet (peace and blessings of Allah be upon him) spoke about the killer and the one who seizes the belongings (not about the one who fights).