अश्रद्दधानानामाचमनप्रोक्षणेषु रसमुपचार्य देवताभिशापं ब्रूयात् अभित्यक्तं वा दंशयित्वा ॥ कZ_०५.२.४४ ॥
aśraddadhānānām ācamanaprokṣaṇeṣu rasam upacārya devatābhiśāpaṃ brūyāt abhityaktaṃ vā daṃśayitvā ।
For those who do not believe, by applying a substance to their sipping-water or sprinkling-water, he should declare the “curse of the deity”; or he should have them bitten by something set upon them.
Deterrence: it suppresses skepticism that could undermine revenue and authority by making disbelief appear dangerous.
Introduce a substance or engineer a bite, then attribute the resulting harm to divine curse.