Excessiveness in religion
It is narrated from the words of ‘Abdillah bni Mas’ud, may Allah be pleased with him: “The Messenger of Allah ﷺ said:
“Gone are those who show excessive severity / fastidious!” – and he repeated it three times! ”.
Muslim # 2670.
• Imam al-Nawawi writes, may Allah have mercy on him:
“That is: unnecessarily deepening, reaching extremes, crossing boundaries in their statements and in their actions!” – the end of the quote.
See Sharh Sahih Muslim, 220/16.