Ramayana
नैतदेको भवानेव करिष्यति विपर्ययम् । सुरासुरैराचरितं तत्कुरुष्व वचो मम ॥ 7-11-19 ॥
"You will not be the only one to bring about such a reversal; this has been practiced by both gods and asuras alike. Therefore do as I say."
english translation