Sunan Ibn Majah 397
سنن ابن ماجه#397HasanIt was narrated from Abu Sa'eed that:The Messenger of Allah said: "There is no ablution for one who does not mention the Name of Allah (before doing it)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Fouad Abd al-BaqiHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 1:131