(25) باب التَّرْغِيبِ فِي قِيَامِ رَمَضَانَ وَهُوَ التَّرَاوِيحُ
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
He who observed prayer at night during Ramadan, because of faith and seeking his reward from Allah, his previous sins would be forgiven.
Reference: Sahih Muslim 759 a
In-book reference: Book 6, Hadith 207
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1662