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)‏‏)‏ ‏.‏

'Aishah (May Allah be pleased with her) reported

The Messenger of Allah (ﷺ) used to strive more in worship during Ramadan than he strove in any other time of the year; and he would devote himself more (in the worship of Allah) in the last ten nights of Ramadan than he strove in earlier part of the month.[Muslim].