Bhagavatapurana 9.14.22

9.14.22

ghṛtaṃ me vīra bhakṣyaṃ syān nekṣe tvānyatra maithunāt /
vivāsasaṃ tat tatheti pratipede mahāmanāḥ //

22. O heroic one! my food is clarified butter; I should not see thee naked except in our intimate relations; these are my conditions”, said she; the noble-minded king accepted them and said.