SHAFAQNA – It is narrated from Imam Sadeq (AS) who said: There are six cases which the believer can benefit from even after death, and they are: 1) a decent child who asks forgiveness from God for his parents 2) and a Quran which belongs to the believer and is being used 3) and digging a water well 4) and planting a tree 5) and helping to flow a stream for the sake of God 6) and a good behaviour which is left as his/her legacy and others follow it [1].
[1] Khisal, Sheikh Sadooq, Babul Settah, Vol. 9.