Rasarnava 2.110

2.110

yaḥ purā devadeveśi varṇito rasabhairavaḥ
sadyojātaṃ tasya jānu vāmadevaṃ tu guhyakam //

The Rasabhairava who was previously described, O goddess of the gods: / Sadyojāta is his knee, and Vāmadeva his secret part;