It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said:
There are three whose supplications are not turned back: A justruler, and a fasting person until he breaks his fast. And, thesupplication of one who has been wronged is raised by Allah up to theclouds on the Day of Resurrection, and the gates of heaven are openedfor it, and Allah says, 'By My Might I will help you (against thewrongdoer) even if it is after a while.'"
English reference: Vol. 1, Book 7, Hadith 1752
Arabic reference: Book 7, Hadith 1824