Gita 04.28 explained
Bg 4.28 dravya-yajñās tapo-yajñā yoga-yajñās tathāpare svādhyāya-jñāna-yajñāś ca yatayaḥ saṁśita-vratāḥ Synonyms: dravya-yajñāḥ — sacrificing one’s possessions; tapaḥ-yajñāḥ — sacrifice in austerities; yoga-yajñāḥ — sacrifice in eightfold mysticism; tathā — thus; apare — others; svādhyāya — sacrifice [...]