It is narrated from Sayyiduna Imran bin Husayn (may Allah be pleased with him) that he came to the Prophet (peace and blessings be upon him) with a brass ring on his upper arm. He (peace and blessings be upon him) asked: "What is this?" He said: It is for wahinah (pain in the arm). He (peace and blessings be upon him) said: "Would it please you to be left to rely on it? Throw it away from yourself."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15439