Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 31
Sanskrit:
ततोऽतिकायस्य निरुद्धमार्गिणोह्युद्गीर्णदृष्टेर्भ्रमतस्त्वितस्तत: ।पूर्णोऽन्तरङ्गे पवनो निरुद्धोमूर्धन् विनिर्भिद्य विनिर्गतो बहि: ॥ ३१ ॥
ITRANS:
tato ’tikāyasya niruddha-mārgiṇohy udgīrṇa-dṛṣṭer bhramatas tv itas tataḥpūrṇo ’ntar-aṅge pavano niruddhomūrdhan vinirbhidya vinirgato bahiḥ
Translation:
Then, because Kṛṣṇa had increased the size of His body, the demon extended his own body to a very large size. Nonetheless, his breathing stopped, he suffocated, and his eyes rolled here and there and popped out. The demon’s life air, however, could not pass through any outlet, and therefore it finally burst out through a hole in the top of the demon’s head.