Abu al-Darda reported the Messenger of Allah صلی اللہ علیہ وسلم as saying: when a man cures anything, the curse goes up to heaven and the gates of heaven are locked against it. Then it comes down to the earth and its gates are locked against it. Then it goes right and left, and if it finds no place of entrance it returns to the thing which was cursed, and if it finds no place of entrance it returns to the thing which was cursed, and if it deserves what was said (it enters it), otherwise it returns to the one who uttered it. Abu Dawud said: Marwan bin Muhammad said: He is Rabah bin al-Walid who heard from him (nimran). He (Marwan bin Muhammad) said: Yahya bin Hussain was confused in it.