Humam (may Allah have mercy on him) says: A guest stayed with Lady Aisha (may Allah be pleased with her). She ordered a yellow sheet for him. He slept in it and had a wet dream in it. Now he was embarrassed to send the cloth back as it had traces of the wet dream, so he dipped the sheet in water and then sent it back. Lady Aisha (may Allah be pleased with her) said: "Why has he ruined our cloth? It would have been sufficient for him to scrape it off with his fingers." I would sometimes scrape it off the garment of the Messenger of Allah (peace and blessings be upon him) with my fingers.