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." <b>[Al-Bukhari and Muslim]</b>.
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)) .