Vaisesika Sūtra 7.1.24

गुणैर्दिग्व्याख्याता ॥२४॥

guṇair digvyākhyātā ॥24॥

[गुणैः (guṇaiḥ) - by the qualities; दिक् (dik) - direction; व्याख्याता (vyākhyātā) - explained;]

Direction is explained by the qualities.