عن عمر بن الخطاب رضي الله عنه قال‏:‏ قال النبي صلى الله عليه وسلم ‏:‏‏"‏الميت يُعذب في قبره بما نِيح عليه ‏"‏‏. وَفِي روايةٍ:"مَا نِيحَ علَيْهِ"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏

Abu Hurairah (May Allah be pleased with him) said

The Messenger of Allah (ﷺ) said, "Two things are signs of disbelief on the part of those who indulge in them: Slandering one's lineage and wailing over the dead."[Muslim].