Lady Aisha (may Allah be pleased with her) narrates that a woman stretched out her hand towards the Messenger of Allah (peace and blessings be upon him) from behind a veil, but the Noble Prophet (peace and blessings be upon him) withdrew his hand and said: I do not know whether this is the hand of a man or a woman. She said: Yes, I am a woman. The Prophet (peace and blessings be upon him) said: If you are a woman, you should have changed the color of your nails with henna.