عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلّى الله عليه وسلّم: ثَلاَثَةٌ لاَ تُرَدُّ دَعْوَتُهُمُ الصَّائِمُ حَتَّى يُفْطِرَ وَالإِمَامُ الْعَادِلُ وَدَعْوَةُ الْمَظْلُومِ يَرْفَعُهَا اللَّهُ فَوْقَ الْغَمَامِ وَيَفْتَحُ لَهَا أَبْوَابَ السَّمَاءِ وَيَقُولُ الرَّبُّ وَعِزَّتِي لأَنْصُرَنَّكَ وَلَوْ بَعْدَ حِينٍ.
Hazrat Abu Hurairara reported that, “Allah’s Messengersa said, ‘There are three whose supplication is never turned away: the fasting individual until they break their fast, the just Imam, and the plea of the oppressed. Allah elevates it above the clouds and opens for it the gates of the heavens. And the Lord declares, ‘By My majesty, I will assuredly come to your aid, even if it be after some time.’’”
(Jami‘ at-Tirmidhi, Kitab ad-da‘wati ‘an rasulillahisa, Hadith 3598)