Sayyidah Aisha (may Allah be pleased with her) reports that the Messenger of Allah (peace and blessings be upon him) said: "Whoever supplicates against his oppressor has indeed taken retribution for his oppression."
Hadith Referenceمسند الشهاب / 386
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«إسناده ضعيف ، وأخرجه ترمذي : 3552، وابن ابي شيبة : 30192، وابويعلي : 4454» ابوحمزہ ضعیف ہے ، اس میں ایک اور علت بھی ہے ۔