Bhagavad Gita 6.1
Lord Shri Krishna said: He who acts out of duty, without considering the consequences, is truly spiritual and a true ascetic; not he who merely observes rituals or shuns all action.
श्री भगवानुवाच
अनाश्रितः कर्मफलं कार्यं कर्म करोति यः।
स संन्यासी च योगी च न निरग्निर्न चाक्रियः॥śrī bhagavānuvāca
anāśritaḥ karmaphalaṃ kāryaṃ karma karoti yaḥ|
sa saṃnyāsī ca yogī ca na niragnirna cākriyaḥ||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).