It is narrated from Rasheed Hujairi’s father that a man said to Sayyiduna Ibn Amr (may Allah be pleased with him):“On the day of the Battle of Yarmouk, please pardon me for any harm that came to you from me, and tell me a hadith that you yourself heard from the Prophet Muhammad (peace and blessings be upon him).”He replied:“I heard the Prophet Muhammad (peace and blessings be upon him) say: ‘A Muslim is the one from whose tongue and hand other Muslims are safe.’”