Bhagavad Gita Verse 16.24

इससे तेरे लिये इस कर्तव्य और अकर्तव्य की व्यवस्था में शास्त्र ही प्रमाण है । ऐसा जानकर तू शास्त्र विधि से नियत कर्म ही करने योग्य है|

Therefore, O Pandava, regard the Holy Vedas as a guide to what is right and what is incorrect. Fully understand the words in these sacred writings, and most of all in this life, dutifully perform your responsibilities and work in their entirety.