Abu Hurairah (RA) narrated that the Messenger of Allah (ﷺ) said: “There are three whose supplication is not rejected: The fasting person when he breaks his fast, the just leader, and the supplication of the oppressed person; Allah raises it up above the clouds and opens the gates of heaven to it. And Lord says: ‘By My might, I shall surely aid you, even if it should be after a while.'

Reference: Hasan. Tirmidhi: 3598