Sunan Ibn Majah 399
سنن ابن ماجه#399SahihIt was narrated that Abu Hurairah said:"The Messenger of Allah said: 'There is no prayer for one who does not have ablution, and there is no ablution for one who does not mention the Name of Allah (before it)
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-BaqiHasan
Zubair Ali ZaiSahih
In-book reference: 1:133