Vaisesika Sūtra 7.2.03

एकत्वैकपृथक्त्वयोरेकत्वैकपृथक्त्वाभावोऽणुत्वमहत्त्वाभ्यां व्याख्यातः ॥३॥

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