I read in a book (I think by an nawawi) that whoever says aaoutho billahis-samiul alim minashatytairajeem (three times) and then recites the last three ayahs of surah hashr in the morning, 70,000 angels will pray for him untill the evening and if he dies on that day he will be raised with the martyrs,and the same virtues for one who says the above in the evening… would you please enlighten me as to whether this is authentic or hasan or weak.