وَعَنْ أَبِي هُرَيْرَةَ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «ثَلَاثَةٌ لَا تُرَدُّ دَعْوَتُهُمْ: الصَّائِمُ حِينَ يُفْطِرُ وَالْإِمَامُ الْعَادِلُ وَدَعْوَةُ الْمَظْلُومِ يَرْفَعُهَا اللَّهُ فَوْقَ الْغَمَامِ وَتُفْتَحُ لَهَا أَبْوَابُ السَّمَاءِ وَيَقُولُ الرَّبُّ: وَعِزَّتِي لَأَنْصُرَنَّكِ وَلَوْ بعد حِين»
one who has just ended a fast, a just imam, and one who has been wronged whose supplication is raised by God above the clouds and for which the gates of heaven are opened. The Lord says, ‘I swear by my might that I will certainly help you, though it be after some time’.
Mishkat al-Masabih 2151, Book 10, Supplications, Hadith 25. 1 min read