It was
narrated that Abu Hurairah said:
“The Prophet (ﷺ) visited
the
grave of his mother and wept, causing the people around him to
weep.
Then he said: ‘I asked my Lord for permission to seek
forgiveness
for her, but He did not give me permission. Then I asked
my Lord for
permission to visit her grave and He gave me permission.
So visit the
graves, for they will remind you of death.’”