Sunan an-Nasa'i 1982
سنن النسائي#1982SahihIt was narrated from Abu Laila:That Zaid bin Arqam offered the funeral prayer and said the Takbir five times, and said that the Messenger of Allah had said the Takbir like this
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 21:165