Mahabharata 20.5

तस्मात्पार्थ महायज्ञैर्यजस्व बहुदक्षिणैः
स्वाध्याययज्ञा ऋषयो ज्ञानयज्ञास्तथापरे

Tasmatpartha mahayagyairyajasva bahudakshinaih
Svadhyayayagya rishayo gyanayagyastathapare