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Hazrat Abu Hurairah (radiyallahu anhu) reports: Rasulullah (sallallahu alaihi wasallam) said: “There are three people whose duas are not rejected, the fasting person until he breaks the fast, the just ruler and the dua of the oppressed whose dua Allah lifts above the clouds and opens unto it the doors of heavens, and Allah says: “I swear by My honour, verily I shall assist you even though it may be after some time.”