Bhagavad Gita 18.59

यदहङकर्माश्रित्य न योत्स्य इति मन्यसे |
मिथ्याैष व्यवसायस्ते प्रकृतिस्त्वां नियोक्ष्यति

Translation

If, motivated by pride, you think, “I shall not fight,” your decision will be in vain. Your own nature will compel you to fight.