We went out with God’s Messenger one night and came upon a man who made supplication with persistence. The Prophet said, “He will have done something which guarantees if he puts a seal to it.” One of the people asked what he should use for a seal, and he replied, “Amen”.
Wa’il b. Hujr said that he heard God’s Messenger recite, “Not of those with whom Thou art angry, nor of those who go astray” (Al-Qur’an 1:7) and say “Amen”, prolonging the word.
Tirmidhi, Abu Dawud, Darimi and Ibn Majah transmitted it.
