It is narrated from Hazrat Ubayy bin Ka'b (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Give glad tidings to this Ummah of greatness and elevation, religion and help, and authority on the earth (the narrator is in doubt about the sixth thing). So whoever among them performs an act of the Hereafter for the sake of the world will have no share in the Hereafter.