Sayyiduna Abu Huraira (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: "The supplication of the fasting person is not rejected."
Hadith Referenceمسند الشهاب / 230
Hadith Gradingمحدثین:إسناده حسن
Hadith Takhrij«إسناده حسن ، وأخرجه ترمذي : 3598، وابن ماجه : 1752»