Bhagavad Gita 3.9

यज्ञार्थात्कर्मणोऽन्यत्र लोकोऽयं कर्मबन्धनः।तदर्थं कर्म कौन्तेय मुक्तसंगः समाचर ॥३.९॥

yajñārthātkarmaṇo’nyatra loko’yaṃ karmabandhanaḥtadarthaṃ karma kaunteya muktasaṃgaḥ samācara

The world is bound by actions other than those performed for the sake of sacrifice; do thou, therefore, O son of Kunti (Arjuna), perform actions for that sake alone, free from attachment.

गीता