BG 4.28
स्वाध्यायज्ञानयज्ञाश्च यतयः संशितव्रताः ॥
svādhyāya-jñāna-yajñāś ca yatayaḥ saṁśita-vratāḥ
Word-for-word meanings
dravya-yajñāḥ — [some people] [perform] yajña by offering articles in charity; tapaḥ-yajñāḥ — [others] [perform] yajña by undertaking penance; yoga-yajñāḥ — [others] [perform] yajña in the form of the classical yoga discipline; ca — while; tathā apare — others still; jñāna-yajñāḥ — [engage in] yajña through cultivation of wisdom; svādhyāya — by study of the Vedas; yatayaḥ — [all these performers] who are perseverant [in their practices]; saṁśita-vratāḥ — [are] observant of austere vows.
Translation
Some people perform yajña by offering articles in charity, others perform yajña by undertaking penance, others do so through the classical yoga discipline, while others still engage in yajña through cultivation of wisdom by study of the Vedas. All of these performers, who are perseverant in their practices, observe austere vows.