Pitṛgaṇa-Vibhāga (Classification of the Pitṛs) and the Śrāddha–Soma Nourishment Cycle
विराजस्य द्विजश्रेष्ठा वैराजा इति विश्रुताः / एते वै पितरस्तात योगानां योगवर्धनाः
virājasya dvijaśreṣṭhā vairājā iti viśrutāḥ / ete vai pitarastāta yogānāṃ yogavardhanāḥ
O best of the twice-born, those of Virāj are famed as the Vairājas. My son, they are the Pitṛs, increasers and nourishers of the powers of yoga.