The Parents, the Traveller and the Oppressed
Hazrat Abu Hurairah (radhiyallahu ‘anhu) reports that Hazrat Rasulullah (sallallahu ‘alaihi wasallam) said, “Three duas are such that they will undoubtedly gain acceptance; the dua of the father (or mother, in regard to their child), the dua of the musaafir (traveller) and the dua of the oppressed.”