Sunan Abi Dawud 4224
سنن أبي داود#4224Da'ifIyas 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)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniDaif
Muhammad Muhyi Al-Din Abdul HamidDaif
Zubair Ali ZaiIsnaad Hasan
In-book reference: 36:11