Hazrat Amir Muawiyah (may Allah be pleased with him) once wrote a letter to Hazrat Mughirah (may Allah be pleased with him) asking him to write and send something that he had heard from the Noble Prophet (peace and blessings be upon him). He replied that when the Noble Prophet (peace and blessings be upon him) finished the prayer, he used to say: There is no deity except Allah, He is One, He has no partner, sovereignty belongs to Him and all praise is for Him, and He has power over everything.