Vaisesika Sūtra 6.1.13

तथा विरुद्धानां त्यागः ॥१३॥

tathā viruddhānāṁ tyāgaḥ ॥13॥

[तथा (tathā) - likewise; विरुद्धानाम् (viruddhānām) - of the opposed; त्यागः (tyāgaḥ) - relinquishment;]

Likewise, relinquishment (tyāga) is that which is opposed (to taking others' wealth).