Riyad as-Salihin, Book 1, Hadith 144 (In-Book) ⓘ
Ibn Mas'ud (May Allah be pleased with him) reported: The Prophet said, "Ruined are those who insist on hardship in matters of the Faith." He repeated this three times.[Muslim]
وعن ابن مسعود رضي الله عنه أن النبي صلى الله عليه وسلم قال: "هلك المتنطعون" قالها ثلاثاً " ((رواه مسلم))