Riyad as-SalihinChapter 8Hadith 510
Full Sharh — Riyad as-Salihin 510
وعن أبي هريرة رضي الله عنه، عن النبي صلى الله عليه وسلم قال: "من قام ليلة القدر إيمانا واحتسابًا غفر له ما تقدم من ذنبه". ((متفق عليه)) .
English Translation
Abu Hurairah (May Allah be pleased with him) reported:: The Prophet (ﷺ) said, "Whosoever performs Qiyam during Lailat-ul-Qadr (Night of Decree), with Faith and being hopeful of Allah's reward, will have his former sins forgiven.".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of Virtues
Hadith Number
510