ثَلاثُ دَعَوَاتٍ مُسْتَجَابَاتٌ لا شَكَّ فِيهِنَّ: دَعْوَةُ الْمَظْلُومِ، وَدَعْوَةُ الْمُسَافِرِ، وَدَعْوَةُ الْوَالِدِ عَلَى وَلَدِهِ
(سنن الترمذی، حدیث: 1905، سنن ابن ماجہ، حدیث: 3862)
In Islam, the supplication of a father, the supplication of a traveler, and the supplication of the oppressed are among those prayers in which there is no doubt of acceptance. These three supplications are considered mustajab al-da‘wat (those supplications that Allah surely accepts), as mentioned in a hadith narrated by Abu Hurairah (RA).
Definition of Mustajab al-Da‘wat
Mustajab al-Da‘wat refers to a person whose supplication Allah accepts.
Supplications that are Mustajab al-Da‘wat
The supplication of the father:
The prayer of a father is among those that Allah accepts.
The supplication of the traveler:
The prayer of a traveler is one that Allah accepts.
The supplication of the oppressed:
The prayer of an oppressed person is also mustajab al-da‘wat, meaning Allah accepts it