Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 17
Sanskrit:
इत्यादिष्टस्तमसुर उपाधावत् स्वगात्रत: ।केदार आत्मक्रव्येण जुह्वानोऽग्निमुखं हरम् ॥ १७ ॥
ITRANS:
ity ādiṣṭas tam asuraupādhāvat sva-gātrataḥkedāra ātma-kravyeṇajuhvāno gni-mukhaṁ haram
Translation:
[Śukadeva Gosvāmī continued:] Thus advised, the demon proceeded to worship Lord Śiva at Kedāranātha by taking pieces of flesh from his own body and offering them as oblations into the sacred fire, which is Lord Śiva’s mouth.