Abu Sa'eed Al-Khudri narrated that the Messenger of Allah (s.a.w) said:"Whoever had the weight of a speck of faith in his heart will depart from the Fire." Abu Sa'eed said: "Whoever has doubt then let him recite: Indeed Allah does not deal unjustly with even the weight of a speck

English translation · Jami' at-Tirmidhi