"من قام ليلة القدر إيمانا واحتسابًا غفر له ما تقدم من ذنبه"
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." [Al-Bukhari and Muslim] .