The Book of Wills
Ṣaḥīḥ Muslim 4223
إِذَا مَاتَ الإِنْسَانُ انْقَطَعَ عَنْهُ عَمَلُهُ إِلاَّ مِنْ ثَلاَثَةٍ إِلاَّ مِنْ صَدَقَةٍ جَارِيَةٍ أَوْ عِلْمٍ يُنْتَفَعُ بِهِ أَوْ وَلَدٍ صَالِحٍ يَدْعُو لَهُ
idhā māta al-insānu ānqaṭaʿa ʿanhu ʿamaluhu illā min thalāthatin illā min ṣadaqatin jāriyatin aw ʿilmin yuntafaʿu bihi aw waladin ṣāliḥin yadʿū lah
Transliteration generated from the Arabic vowel marks
The full narration
Abu Huraira (Allah be pleased with him) reported Allah's Messenger (ﷺ) as saying:When a man dies, his acts come to an end, but three, recurring charity, or knowledge (by which people) benefit, or a pious son, who prays for him (for the deceased)
Source
Ṣaḥīḥ Muslim · 4223
Ṣaḥīḥ