Manasara 7.42

7.42

etadbahistataścaiśāccatuṣkarṇe pradakṣiṇe
apavatsāpavatsyaśca pratyagardhārdhabhogyatā

Outside of this, then clockwise in the four corners beginning from Īśāna:
Apavatsa and Apavatsyā each enjoy half a plot;