Bhagavad Gita · 3.9

यज्ञार्थात्कर्मणोऽन्यत्र लोकोऽयं कर्मबन्धनः।तदर्थं कर्म कौन्तेय मुक्तसङ्गः समाचर॥

yajñārthāt karmaṇo 'nyatra loko 'yaṁ karma-bandhanaḥ tad-arthaṁ karma kaunteya mukta-saṅgaḥ samāchara

Work done as a sacrifice for the Supreme is free from bondage. Therefore, O son of Kunti, perform your duty free from attachment, as an offering.

— Bhagavad Gita 3.9

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)