Abu Huraira reported God’s messenger as saying, “When a man dies no further reward is recorded for his actions, with three exceptions: sadaqa which continues to be supplied, or knowledge from which benefit continues to be reaped, or the prayers of a good son for his dead father.” Muslim transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب العلم / 203
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «رواه مسلم (14/ 1631)»