Vaisesika Sūtra 7.2.03

ekatvaika-pṛthaktvayor ekatvaika-pṛthaktvābhāvo'ṇutva-mahattvābhyāṃ vyākhyātaḥ ॥3॥

The oneness of oneness-in-difference, and absence of oneness-in-difference in oneness is explained by minuteness and greatness.