Bhagavatapurana 6.9.6

6.9.6

brahmahatyāmañjalinā jagrāha yadapīśvaraḥ /
saṃvatsarānte tadaghaṃ bhūtānāṃ sa viśuddhaye //

6. & 7. Though powerful to ward it off Indra accepted the Brahmahatya (the sin of killing a brahmin) with his own hands; and at the end of a year, wishing to cleanse himself of that sin (in the opinion of other beings), Indra divided it in four parts among the earth, water, trees and women. The earth received a fourth of it along with the boon (or on the condition) that the hollow caused by digging should again become filled up.