Raibhya-putrayoḥ satra-vṛttāntaḥ — The Satra Episode of Raibhya’s Sons
Parāvasu and Arvāvasu
उग्र॑ं तप: समास्थाय दिवाकरमथाश्रित: । रहस्यवेदं कृतवान् सूर्यस्य द्विजसत्तम:
ugraṁ tapaḥ samāsthāya divākaram athāśritaḥ | rahasyavedaṁ kṛtavān sūryasya dvijasattamaḥ ||
Undertaking fierce austerities and taking refuge in the Sun (Divākara), that best of the twice-born sages obtained the Sun’s secret knowledge—an esoteric Vedic teaching—through disciplined tapas and devotion.
लोगश उवाच
Intense self-discipline (tapas) combined with taking refuge in a worthy divine source (here, Sūrya) is presented as a means to gain higher, guarded knowledge; spiritual attainments are shown as fruits of sustained austerity and proper orientation of devotion.
The speaker states that a foremost Brahmin-sage performed severe austerities, sought the Sun as his refuge, and thereby acquired the Sun’s ‘rahasya-veda’—a secret or esoteric Vedic teaching—indicating a transmission of special knowledge earned through tapas.