Brahma-vidyā: Satya–Tapas and the Enumeration of Tattvas
Arjuna–Vāsudeva framed dialogue
अन्योन्यनियतान् वैद्यान् धर्मसेतुप्रवर्तकान् | तानहं सम्प्रवक्ष्यामि शाश्वताल्लॉकभावनान्
I shall expound the eternal Sanātana Dharma, a teaching that brings welfare to the world, to those Brahmanas—learned in the Vedas—who keep one another within discipline and who establish the bounds of Dharma.
वायुदेव उवाच