It is narrated from Hazrat Umm Salamah (may Allah be pleased with her) that once I and Hazrat Maymunah were sitting with the Prophet (peace and blessings be upon him) when Hazrat Ibn Umm Maktum came. This incident occurred after the command of hijab had been revealed. The Prophet (peace and blessings be upon him) said, "Observe veil from him." We said, "O Messenger of Allah, is he not blind? He cannot see us nor recognize us." The Prophet (peace and blessings be upon him) said, "Are you both also blind? Can you not see him?"