Hadith on Supplications: The supplication of a just ruler, a fasting person, and oppressed person are never rejected

Abu Huraira reported: The Messenger of Allah, peace be upon him, said, “The supplications of three persons are never turned away: a just ruler, a fasting person until he breaks his fast, and the supplication of an oppressed person which is raised by Allah to the clouds on the Day of Resurrection; the gates of heaven are opened for it and Allah says: By My might, I will help you even if it is after a while.”

[Sunan Ibn Majah, Book of Fasting, Number 1624, Hasan]

عَنْ أَبِي هُرَيْرَةَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ثَلَاثَةٌ لَا تُرَدُّ دَعْوَتُهُمْ الْإِمَامُ الْعَادِلُ وَالصَّائِمُ حَتَّى يُفْطِرَ وَدَعْوَةُ الْمَظْلُومِ يَرْفَعُهَا اللَّهُ دُونَ الْغَمَامِ يَوْمَ الْقِيَامَةِ وَتُفْتَحُ لَهَا أَبْوَابُ السَّمَاءِ وَيَقُولُ بِعِزَّتِي لَأَنْصُرَنَّكِ وَلَوْ بَعْدَ حِينٍ

سنن ابن ماجه  كتاب الصيام  باب في الصائم لا ترد دعوته