Bhagavad Gita 18.5

Acts of sacrifice, benevolence, and austerity should not be given up, but should be performed, for they purify the aspiring soul.

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

yajñadānatapaḥkarma na tyājyaṃ kāryameva tat|yajño dānaṃ tapaścaiva pāvanāni manīṣiṇām||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).