Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: The Prophet Muhammad (peace be upon him) had a ring made of gold. People also had gold rings made. Then the Prophet Muhammad (peace be upon him) removed it from his hand. He said: "I will never wear it again." Then he had a ring made of silver. He used to keep its stone towards the palm of his hand. He had the words "Muhammad Rasul Allah" engraved on it. This ring remained on his blessed hand until he passed away.
Hadith Referenceصحیح ابن حبان / كتاب الزينة والتطييب / 5494
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «صحيح أبي داود» / (الخاتم): ق.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط مسلم