Bhagavad Gita 4.28

द्रव्ययज्ञस्तपोयज्ञ योगयज्ञस्तथापरे |
स्वाध्यायज्ञानयज्ञाश्च यतय: संस्थितव्रता:

Translation

Some offer their wealth as sacrifice, while others offer severe austerities as sacrifice. Some practice the eight-fold path of yogic practices, and yet others study the scriptures and cultivate knowledge as sacrifice, while observing strict vows.