prayogaḥ yaḥ kaścid upadeśaḥ sa vaktṛjñānapūrvakaḥ, yathā harītakyādiśaktyupadeśaḥ, upadeśaścāyaṃ buddhādīnāṃ dharmādyupadeśa iti svabhāvahetuḥ //
The formal argument [is]: Whatever teaching there is, that is preceded by the teacher's knowledge, as for example the teaching about the powers of harītakī etc.; and this teaching by Buddha etc. about dharma etc. is [such] a teaching - [this is] a natural reason.