Sunan Abi Dawud 908
سنن أبي داود#908Da'ifNarrated Ali ibn AbuTalib: The Messenger of Allah (ﷺ) said: Ali, do not instruct the imam during the prayer. Abu Dawud said: The narrator Abu Ishaq heard only for traditions from al-Harith, this tradition is not one of them
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
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 2:519