The Prophet (ﷺ) said: He who sees something which should be kept hidden and conceals it will be like one who has brought to life a girl buried alive.

That he heard Ibn `Abbas reciting: "No doubt! They fold up their breasts." (11.5) and asked him about its explanation. He said, "Some people used to hide themselves while answering the call of nature in an open space lest they be exposed to the sky, and also when they had sexual relation with their wives in an open space lest they be exposed to the sky, so the above revelation was sent down regarding them."

Allah's Messenger (ﷺ) passed by two graves and said, "Both of them (persons in the grave) are being tortured, and they are not being tortured for a major sin. This one used not to save himself from being soiled with his urine, and the other used to go about with calumnies (among the people to rouse hostilities, e.g., one goes to a person and tells him that so-and-so says about him such-and-such evil things). The Prophet (ﷺ) then asked for a green leaf of a date-palm tree, split it into two pieces and planted one on each grave and said, "It is hoped that their punishment may be abated till those two pieces of the leaf get dried." (See Hadith No 215, Vol 1).

The Messenger of Allah 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 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."

"The thing that the Prophet most liked to conceal himself behind when relieving himself was a hillock or a stand of date-palm trees."