Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 32
Sanskrit:
भित्त्वा वज्रेण तत्कुक्षिं निष्क्रम्य बलभिद् विभु: ।उच्चकर्त शिर: शत्रोर्गिरिशृङ्गमिवौजसा ॥ ३२ ॥
ITRANS:
bhittvā vajreṇa tat-kukṣiṁniṣkramya bala-bhid vibhuḥuccakarta śiraḥ śatrorgiri-śṛṅgam ivaujasā
Translation:
With his thunderbolt, King Indra, who was also extremely powerful, pierced through Vṛtrāsura’s abdomen and came out. Indra, the killer of the demon Bala, then immediately cut off Vṛtrāsura’s head, which was as high as the peak of a mountain.