Vaisesika Sūtra 2.2.15

तथा दक्षिणा प्रतीच्युदीची च ॥१५॥

tathā dakṣiṇā pratīcyudīcī ca ॥15॥

[तथा (tathā): Similarly; दक्षिणा (dakṣiṇā): South; प्रतीच्युदीची (pratīcyudīcī): West and North; च (ca): And;]

Similarly, are the South, the West, and the Northern directions.