因明入正理論疏 3.8

3.8

論　此中法自相相違因者，如說聲常，所作性故，或勤勇無間所發性故。

Treatise: Among these, the reason contradictory to the own-nature of the property is: for example, stating that "Sound is permanent (nitya), because of being produced (kṛtakatva)," or "because of arising immediately after an effort (prayatnānantarīyaka)."