Ramayana
तां प्रविश्य महामायां प्राप्तां गोपतिना पुरा । प्रविवेश सुसंरब्धस्तत्सैन्यं समभिद्रवत् ॥ 7-29-23 ॥
Entering into that great magical power, obtained of old from Gopati, in deep fury he charged forward and fell upon that army.
english translation