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."
قَالَ رَسُولُ اللَّهِ ﷺ ثَلاَثُ دَعَوَاتٍ يُسْتَجَابُ لَهُنَّ لاَ شَكَّ فِيهِنَّ دَعْوَةُ الْمَظْلُومِ وَدَعْوَةُ الْمُسَافِرِ وَدَعْوَةُ الْوَالِدِ لِوَلَدِهِ