Vaisesika Sūtra 2.2.16

एतेन दिगन्तरालानि व्याख्यातानि ॥१६॥

etena digantarālāni vyākhyātāni ॥16॥

[एतेन (etena): In similar way; दिग् (dig): Direction; अन्तर (antara): Between; आला (ālā): Space or distance; व्याख्यातानि (vyākhyātāni): Are explained;]

Similarly, the directions in between are also explained.