Riyad as-Salihin, Book 13, Hadith 1383 (In-Book) ⓘ
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah 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)).