Sayyiduna Anas bin Malik (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: "Beware of the supplication of the oppressed, even if he is a disbeliever, for there is no barrier between it and Allah."
Hadith Referenceمسند الشهاب / 960
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«إسناده ضعيف ، وأخرجه التاريخ لابن معين : 5281 ، الدعا للطبراني : 1321» ابوعبد الغفار عبدالرحمٰن بن عیسٰی مجہول ہے ۔