Riyad as-Salihin 1383
Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "When a man dies, his deeds come to an end except for three things: Sadaqah Jariyah (ceaseless charity); a knowledge which is beneficial, or a virtuous descendant who prays for him (for the deceased)." [Muslim] .
وعنه قال‏:‏ قال رسول الله صلى الله عليه وسلم ‏:‏ ‏
"‏إذا مات ابن آدم انقطع عمله إلا من ثلاث‏:‏ صدقة جارية ،أو علم ينتفع به، أو ولد صالح يدعو له‏"‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏