سنن النسائي

It was narrated that: The Messenger of Allah (ﷺ) passed by one of the gardens of Makkah or Al-Madinah and heard the sound of two men being tormented in their graves. The Messenger of Allah (ﷺ) said: "They are being punished but they are not being punished for anything that was difficult to avoid." Then he said: "Indeed, one of them used not to take care to avoid getting urine on his body or clothes, and the other used to walk around spreading gossip." They he called for a palm stalk which he broke in two and placed a piece of it on each grave. It was said to him: "O Messenger of Allah, why did you do that?" He said: "May it be reduced for them so long as this does not dry out" or: "until this dries out."