[safa]

[Sahih Muslim : Book 13 Kitab Al-Wasiyya, Number 4005]

Abu Huraira (Radi Allah Anhu) reported Allah's Messenger (sal-allahu-alleihi-wasallam) as saying:
"When a man dies, his acts come to an end, but three,
1. Recurring charity,
2. Or knowledge (by which people) benefit,
3. Or a pious son, who prays for him (for the deceased)."