وعن عثمان بن عفان رضي الله عنه قال: سمعت
النبي صلى الله عليه وسلم يقول: «ما من امرئ مسلم تحضره صلاة مكتوبة فيحسن وضوءها وخشوعها وركوعها إلا كانت كفارة لما قبلها من الذنوب مالم تؤتَ كبيرة وذلك الدهر كله»
I heard Messenger of Allah (sallallahu alayhi wa sallam) saying, “When the time for a prescribed Salat is due and a Muslim performs its Wudu and its acts of bowing and prostration properly, this Salat will be an expiation for his past sins, so long as he does not commit major sins, and this applies for ever.”.
Riyad as-Salihin 1046, Book 9, The Book of Virtues, Hadith 56. 1 min read