nacātrānyārthābhiprāyeṇa pravṛttiḥ sambhavati tathā hi dharmaṃ vo bhikṣavo deśayiṣyāmītyevaṃ pratijñāya pravṛtter dharmādyupadeśaparaiveyaṃ deśanā nānyārthaparetyavasīyate /
But here [in this case] there cannot be an undertaking with any other intention, because having declared "O monks, I shall teach you Dharma," this teaching, proceeding [from this declaration], is determined to be focused only on the exposition of Dharma and related matters, not on any other purpose.