The Prophet (peace be upon him) often highlighted to his companions, and to all Muslims in all ages, the importance of actions that may either lead them to earning God’s reward or make them incur His anger and punishment. He was keen to do so when such actions are not given the necessary attention. A case in mind is that outlined by the following Hadith reported by Abdullah ibn Abbas: “The Prophet passed by the wall of a cemetery in Madinah, or perhaps Makkah, when he heard the sound of two people enduring torment in their graves. He said: ‘They are enduring torment, yet for no major sin.’ Then he added: ‘It is major indeed. One of them did not guard himself against his own urine, while the other used to go about with slandering tales.’ He then called for a green branch of the palm tree, split it into two and placed one half on each of the two graves. To the question why he did that he answered: ‘I hoped that their plight would be lightened as long as these branches have not dried.’” (Related by Al-Bukhari). For more read here.