Ramayana
यत्तु मां त्वमभाषिष्ठ युद्ध्यस्वेति सुरेश्वर । नाहं तं प्रतियोत्स्यामि रावणं राक्षसं युधि ॥ 7-27-17 ॥
As for what you said to me, O lord of the gods, 'Do battle,' I shall not fight against this rakshasa Ravana in combat now.
english translation