(11) باب دَعْوَةِ الْوَالِدِ وَدَعْوَةِ الْمَظْلُومِ
It was narrated that Abu Hurairah that :
the Messenger of Allah (saas) said: "There are three supplications that will undoubtedly be answered: the supplication of one who has been wronged; the supplication of the traveler; and the supplication of a father for his child."
Reference: Sunan Ibn Majah 3862
In-book reference: Book 34, Hadith 36
English translation: Vol. 5, Book 34, Hadith 3862