It is narrated from Hazrat Imran (may Allah be pleased with him) that I heard the Prophet (peace and blessings be upon him) say: "There is no vow in anger, and its expiation is the same as the expiation for an oath."
Hadith Referenceمسند احمد / أول مسند البصريين / 19956
Hadith Gradingحکم دارالسلام:إسناده ضعيف جداً، راجع ما قبله