Vaisesika Sūtra 2.2.23

एकद्रव्यत्वान्नद्रव्यम् ॥२३॥

ekadravyatvānnadravyam ॥23॥

[एकद्रव्यत्वात् (ekadravyatvāt): Due to being of one substance; न (na): Not; द्रव्यम् (dravyam): Substance]

(As the sound of the word conveys the meaning) of one substance, not of the other.