api ca bhagavadbhir eva paramārthabrāhmaṇebhyaḥ kṛtam upadeśanaṃ na manvādibhir ityetad āha ye cetyādi
Moreover, the teaching was given to the true brāhmaṇas by the Blessed Ones themselves, not by Manu and others - this is stated [in the verse] beginning with "ye ca"