Bhagavad Gita 3.9
In this world, people are fettered by their actions, unless they are performed as a sacrifice. Therefore, O Arjuna, let your actions be done without attachment, as a sacrifice only.
यज्ञार्थात्कर्मणोऽन्यत्र लोकोऽयं कर्मबन्धनः।
तदर्थं कर्म कौन्तेय मुक्तसंगः समाचर॥yajñārthātkarmaṇo'nyatra loko'yaṃ karmabandhanaḥ|
tadarthaṃ karma kaunteya muktasaṃgaḥ samācara||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).