Sunan Ibn Majah 1506
سنن ابن ماجه#1506SahihIt was narrated from Kathir bin ‘Abdullah, from his father, from his grandfather, that the Messenger of Allah (ﷺ) said the Takbir five times
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih Lighairihi
Zubair Ali ZaiSahih
In-book reference: 6:74