Vaisesika Sūtra 6.1.08

तस्य समभिव्याहारतो दोषः ॥८॥

tasya samabhivyāhārataḥ dōṣaḥ ॥8॥

[तस्य (tasya) - of that; समभिव्याहारतः (samabhivyāhārataḥ) - from deliberate utterance / conduct; दोषः (dōṣaḥ) - fault;]

Fault arises from its deliberate utterance or conduct.