Mishkat al-Masabih
Mishkat al-Masabih 2249
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 ". رَوَاهُ التِّرْمِذِيّ
Abu Hurayrah reported that the Messenger of God (peace be upon him) said: ‘There are three whose supplication is not rejected: the fasting person when breaking the fast, the just leader, and the supplication of the oppressed. God raises it above the clouds, the gates of heaven are opened for it, and the Lord says, “By My might, I will surely support you, even after a while.”’ Al-Tirmidhi transmitted it. The Arabic source grades it weak (al-Albani).