Those Whose Du’a Are Answered

 عَنْ أَبِي هُرَيْرَةَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ثَلَاثُ دَعَوَاتٍ يُسْتَجَابُ لَهُنَّ لَا شَكَّ فِيهِنَّ دَعْوَةُ الْمَظْلُومِ وَدَعْوَةُ الْمُسَافِرِ وَدَعْوَةُ الْوَالِدِ لِوَلَدِهِ

It was narrated by Abu Hurairah that the Messenger of Allah (pbuh) 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."

Grade: Hasan (Darussalam) 

Reference: Sunan Ibn Majah 3862

(Hadith translation obtained from sunnah.com)

Lessons:

1) To make du’a is an act of worship

2) There are three groups of people whose du’a are answered:

a. The du’a of those who have been treated unjustly

b. The du’a of travellers

c. The du’a of parents for their children

Thus, parents should only make good supplications for their children and avoid uttering bad words towards them as these may also be considered as supplications and be answered.