‘Uthman b. ‘Abdallah b. Mauhib said

My people sent me to Umm Salama with a bowl of water. Whenever anyone was smitten by the evil eye or anything else he sent her a basin, and she took out some hairs of Allah's Messenger ﷺ which she kept in a little silver bell.* She moved it about for him in the water and he drank some of it. I looked into the little bell and saw some red hairs. Bukhari transmitted it. * Mirqat, iv, 515, says that although the word means a bell, it may here be used of a small box in the shape of a bell. This is the kind of bell that would be used on a tambourine.