(36) باب اسْتِئْذَانِ النَّبِيِّ صلى الله عليه وسلم رَبَّهُ عَزَّ وَجَلَّ فِي زِيَارَةِ قَبْرِ أُمِّهِ
Abu Huraira reported:
The Apostle of Allah (ﷺ) visited the grave of his mother and he wept, and moved others around him to tears, and said: I sought permission from my Lord to beg forgiveness for her but it was not granted to me, and I sought permission to visit her grave and it was granted to me so visit the graves, for that makes you mindful of death.
Reference: Sahih Muslim 976 b
In-book reference: Book 11, Hadith 135
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 2130