Ramayana
यश्च यश्च सुरेन्द्रः स्याद्ध्रुवः स न भविष्यति । एष शापो मया मुक्त इत्यसौ त्वां तदा ऽब्रवीत् ॥ 7-30-36 ॥
And whoever should become lord of the gods, he shall not remain secure in that office. 'This curse is released by me'—thus did he then speak to you.
english translation