Valmiki Ramayana Sundara Kanda Sarga 58 Shloka 14

पाकशासनः who killed Paka (an ogre), भगवान् god, महेन्द्रः Mahendra, नगानाम् of the mountains, चरितम् the story (of their cruel deeds), श्रुत्वा on hearing, एषाम् their, पक्षान् wings, वज्रेण by the thuinderbolt, सहस्रशः into a thousand pieces, चिच्छेद cut off.

'Mahendra, the killer of ogre Paka, heard the story (of the cruel deeds) of mountains and cut off their wings into a thousand pieces with his thunderbolt.