Srimad Bhagavatam Canto 06, Chapter 13, Text 15

SB 6.13.15

sa avasat puskara-nala-tantun
 alabdha-bhogo yad ihagni-dutah
varsani sahasram alaksito ’ntah
 sañcintayan brahma-vadhad vimoksam
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Always thinking of how he could be relieved from the sinful reaction for killing a brahmana, 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.
Srimad Bhagavatam Canto 06, Chapter 13, Text 14
Srimad Bhagavatam Canto 06, Chapter 13, Text 16