Manasara 9.147

9.147

vṛttaṃ vā caturaśraṃ vā vāstusvākṛtivaprayuk
pūrvadvāramathaiśāne cāgnidvāraṃ tu dakṣiṇe

Circular or square, fitted with a rampart conforming to the shape of the site; / the eastern gate is in the northeast, and the southern gate is in the southeast;