Volume 8, Book 73, Number 81:
Narrated Ibn ‘Abbas:
Once the Prophet went through the grave-yards of Medina and heard the voices of two humans
who were being tortured in their graves. The Prophet said, “They are being punished, but they are
not being punished because of a major sin, yet their sins are great. One of them used not to save
himself from (being soiled with) the urine, and the other used to go about with calumnies
(Namima).” Then the Prophet asked for a green palm tree leaf and split it into two pieces and placed
one piece on each grave, saying, “I hope that their punishment may be abated as long as these pieces
of the leaf are not dried.”