Chapter 18 - Verse 5

यज्ञदानतपःकर्म न त्याज्यं कार्यमेव तत् ।
यज्ञो दानं तपश्चैव पावनानि मनीषिणाम् ॥ ५ ॥

yajñadānatapaḥkarma na tyājyaṃ kāryameva tat .
yajño dānaṃ tapaścaiva pāvanāni manīṣiṇām .. 5 ..


Practice of worship, gift, and austerity should not be given up; it is quite necessary; worship, gift and austerity are the purifiers of the wise.
Read the commentary
The three sorts of action should be performed, for, they cause purity in the wise, i.e., in those who have no desire for fruits.