Ramayana
इन्द्रस्य च भयं तीव्रं सुराणां च महात्मनाम् । मान्धातरि कृतोद्योगे देवलोकजिगीषया ॥ 7-67-7 ॥
"When Mandhata had thus set himself, in his desire to conquer the realm of the gods, a keen terror seized Indra and the great-souled celestials."
english translation