It is narrated from Sayyiduna Abu Ayyash al-Zuraqi (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever says: 'There is no god but Allah, alone, without partner; His is the dominion and His is all praise, and He has power over all things,' it will be for him like freeing a slave from the descendants of Isma'il (peace be upon him); ten good deeds are written for him, ten sins are wiped away from him, he is raised ten degrees, and he is protected from Satan until evening. And if he says it in the evening, he will have the like of that." The narrator said: A man saw the Messenger of Allah (peace and blessings be upon him) in a dream and said: "O Messenger of Allah! Abu Ayyash al-Zuraqi has told us such and such from you." The Prophet (peace and blessings be upon him) said: "Abu Ayyash has spoken the truth."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 5122