Sunan Ibn Majah 3862
سنن ابن ماجه#3862HasanIt 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Fouad Abd al-BaqiHasan
Shuaib Al ArnautHasan Lighairihi
Zubair Ali ZaiHasan
In-book reference: 34:36