(14) باب مَا يَدْعُو بِهِ الرَّجُلُ إِذَا أَصْبَحَ وَإِذَا أَمْسَى
It was narrated from Abu Salam, the servant of the Prophet (saas), that :
the Prophet (saas) said: "There is no Muslim - or no person, or slave (of Allah) - who says, in the morning and evening: 'Radaytu billahi Rabban wa bil-Islami dinan wa bi Muhammadin nabiyyan (I am content with Allah as my Lord, Islam as my religion and Muhammad as my Prophet),' but he will have a promise from Allah to make him pleased on the Day of Resurrection."
Reference: Sunan Ibn Majah 3870
In-book reference: Book 34, Hadith 44
English translation: Vol. 5, Book 34, Hadith 3870