English translation
2209. It was narrated that Abû Hurairah said: "The Messenger of Allâh ﷺ said: 'Whoever spends the nights of Ramaḍân in prayer (Qiyâm) out of faith and in the hope of reward, he will be forgiven his previous sins, and whoever spends the night of Lailat Al-Qadr in prayer out of faith and in the hope of reward, he will be forgiven his previous sins.'" (Ṣaḥīḥ)
