إِذَا مَاتَ الْإِنْسَانُ انْقَطَعَ عَمَلُهُ إِلَّا مِنْ ثَلَاثٍ: صَدَقَةٌ جَارِيَةٌ، أَوْ عِلْمٌ يُنْتَفَعُ بِهِ، أَوْ وَلَدٌ صَالِحٌ يَدْعُو لَهُ
When a person dies, his deeds come to an end except for three: ongoing charity, beneficial knowledge, or a righteous child who prays for him.
Abu Hurairah•Sahih Muslim•Charity