tayoḥ - Their; dvija-varaḥ - the best of brāhmaṇas (Sāndīpani); tuṣṭaḥ - satisfied; śuddha - pure; bhāva - with love; anuvṛttibhiḥ - by the submissive acts; provāca - he spoke; vedān - the Vedas; akhilān - all; sa - together with; aṅga - the (six) corollary literatures; upaniṣadaḥ - and the Upaniṣads; guruḥ - the spiritual master.

That best of brāhmaṇas, the spiritual master Sāndīpani, was satisfied with Their submissive behavior, and thus he taught Them the entire Vedas, together with their six corollaries and the Upaniṣads.