Sayyidina Ibn Abbas (RA) reported that one of the companions of the Prophet (SAW) pitched a tent on a grave. He did not know that there was grave. It was the grave of human beings, who recited surah al-Mulk (#67) to the end of it. He came to the Prophet (SAW) and said, “O Messenger of Allah (SAW), I pitched my tent over a grave without knowing that it was a grave. The man inside recited surah al-Mulk to its end.” The Prophet (SAW) said, “It is the rescuer. It rescues from punisment of the grave.”