Assalamu Alaikum everyone, I read the following ahadith on the internet but without any reference, so i need to confirm their authenticity. The ahadith are as follows: "On the day of Judgement, a person's reward-book will be opened. He will say, Oh my Lord! While I was in the world I performed such and such worships but they are not recorded in the page. He will be answered by the following: they are erased from your book and written to the books of the persons whom you have backbitten," and "On the day of Judgement, a person's good-deeds-book 'Hasanat' will be opened. He will see there the worships he never performed. They will tell him that these are the rewards 'Thawabs' of those who have backbitten you." If someone has knowledge about these, please shed some light on the matter, and the references of the ahadith, i'll be very thankful!