question #1 Sahih al-Bukhari 1378, Book 23, Hadith 130 : What are the consequences of spreading calumnies according to Islamic teachings?

The Prophet (ﷺ) once passed by two graves and said, “They (the deceased persons in those graves) are
being tortured not for a great thing to avoid.” And then added, “Yes, (they are being punished for a big
sin), for one of them used to go about with calumnies while the other never saved himself from being
soiled with his urine.” (Ibn `Abbas added): Then he took a green leaf of a date-palm) and split it into
two pieces and fixed one piece on each grave and said, “May their punishment be abated till these
(two pieces) get dry.”