Narrated Abu Zuhayr an-Numayri: Abu Misbah al-Muqrai said: We used to sit in the company of Abu Zuhayr an-Numayri. He was a companion of the Prophet صلی اللہ علیہ وسلم , and he used to narrate good traditions. Once a man from among us made a supplication. He said: End it with the utterance of Amin, for Amin is like a seal on the book. Abu Zuhayr said: I shall tell you about that. We went out with the Messenger of Allah صلی اللہ علیہ وسلم one night and came upon a man who made supplication with persistence. The Prophet صلی اللہ علیہ وسلم waited to hear him. The Prophet صلی اللہ علیہ وسلم said: He will have done something which guarantees (Paradise for him) if he puts a seal to it. One of the people asked: What should he use as a seal? He replied: Amin, for if he ends it with Amin, he will do something which guarantees (Paradise for him). Then the man who questioned the Prophet صلی اللہ علیہ وسلم came to the man who was supplicating, and said to him: So-and-so, end it with Amin and receive the good news. These are the words of Mahmud. Abu Dawud said: Al-Muqrai is a clan of Himyar.