عَنِ الْمُغِيرَةِ بْنِ شُعْبَةَ قَالَ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم يَقُول: «من نِيحَ عَلَيْهِ فَإِنَّهُ يُعَذَّبُ بِمَا نِيحَ عَلَيْهِ يَوْم الْقِيَامَة»

Bukhari said without a full isnad that when al-Hasan b. ‘Ali died, his wife put a tent over his grave for a year; then when she removed it she heard one shouting and saying, “Have they found what they lost?” and another replied, “No, they have given up hope and gone away.”