(4) باب مَا جَاءَ فِي خَاتَمِ الْحَدِيدِ
Iyas b. al-Harith b. al-Mu'aiqib quoting his grandfather said and his grandfather from his mother's side was Abu Dhubab:
The signet-ring of the Prophet (ﷺ) was of iron polished with silver. Sometimes it remained in my possession. Al-Mu'ayqib was in charge of the signet-ring of the Prophet (ﷺ). (DE)
Reference (DE): Sunan Abi Dawud 4224 (DE)
In-book reference (DE): Book 36, Hadith 11 (DE)
English translation (DE): Book 35, Hadith 4212 (DE)