´It was narrated that Abu Hurairah said:` “The Messenger of Allah (ﷺ) said: ‘Whoever fasts Ramadan and spends its nights in prayer, out of faith and in hope of reward, his previous sins will be forgiven.’”
Hadith ReferenceSunan Ibn Majah / Establishing the Prayer and the Sunnah Regarding Them / Hadith: 1326
Hadith Gradingالألبانی:حسن صحيح | زبیر علی زئی:إسناده حسن