Chapter 4, Verse 28
Part of 4: Jñāna Karm Sanyās Yog — ज्ञानकर्मसंन्यासयोगद्रव्ययज्ञास्तपोयज्ञा योगयज्ञास्तथापरे। स्वाध्यायज्ञानयज्ञाश्च यतयः संशितव्रताः॥
dravya-yajñās tapo-yajñā yoga-yajñās tathāpare swādhyāya-jñāna-yajñāśh cha yatayaḥ sanśhita-vratāḥ
Others again offer wealth, austerity, and Yoga as sacrifice, while ascetics of self-restraint and rigid vows offer the study of scriptures and knowledge as sacrifice.
Some do sacrifice by distributing their wealth to the deserving as charity some offer their Tapas (austerities) as sacrifice some practise the eight limbs of Raja Yoga, viz.? Yama (the five great vows)? Niyama (the canons of conduct)? Asana (posture)? Pranayama (restraint of breath)? Pratyahara (withdrawal of the senses)? Dharana (concentration)? Dhyana (meditation) and Samadhi (superconscious state), and offer this Yoga as a sacrifice some study the scriptures and offer it as sacrifice.