In Abu Nu'aym's "Hilyatul Awliya," it is mentioned that whoever recites the following ten times "Allaahumma aSlih ummata MuHammadin Allaahumma farriji l-karba 'an ummata MuHammadin Allaahumma arHam ummata MuHammadin", then his rank will be written amongst the Abdaal (very high level of saints that keep substituting one for another as one dies). Translation of the du'a: "O Allah! Rectify the ummah of Muhammad O Allah! Grant ease from hardship to the ummah of Muhammad O Allah! Have mercy on the ummah of Muhammad ." Correct me if I'm wrong, .