Sunan Abi Dawud 637
سنن أبي داود#637SahihNarrated Abdullah ibn Mas'ud: I heard the Messenger of Allah (ﷺ) say: He who lets his garment trail during prayer out of pride, Allah, the Almighty, has nothing to do with pardoning him and protecting him from Hell
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
Zubair Ali ZaiIsnaad Hasan
In-book reference: 2:247