Sunan Abi Dawud 3197
سنن أبي داود#3197SahihNarrated Ibn Abi Laila: Zaid b. Arqam used to utter four takbirs (Allah is Most Great) over our dead person (during prayer). He uttered five takbirs on a dead person. So I asked him. He replied: The Messenger of Allah (ﷺ) used to utter those. Abu Dawud said: I remember the tradition of Ibn al-Muthanna in a more guarded way
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Muslim (957)
In-book reference: 21:109