Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 15


स आवसत्पुष्करनालतन्तू-नलब्धभोगो यदिहाग्निदूत: ।वर्षाणि साहस्रमलक्षितोऽन्त:सञ्चिन्तयन् ब्रह्मवधाद्विमोक्षम् ॥ १५ ॥


sa āvasat puṣkara-nāla-tantūnalabdha-bhogo yad ihāgni-dūtaḥvarṣāṇi sāhasram alakṣito ’ntaḥsañcintayan brahma-vadhād vimokṣam


Always thinking of how he could be relieved from the sinful reaction for killing a brāhmaṇa, King Indra, invisible to everyone, lived in the lake for one thousand years in the subtle fibers of the stem of a lotus. The fire-god used to bring him his share of all yajñas, but because the fire-god was afraid to enter the water, Indra was practically starving.