Chapter 18 · Liberation through Renunciation · Krishna said
Bhagavad Gita 18.59 — Nature will compel you
यदहंकारमाश्रित्य न योत्स्य इति मन्यसे। मिथ्यैष व्यवसायस्ते प्रकृतिस्त्वां नियोक्ष्यति ॥
yadahaṃkāramāśritya na yotsya iti manyase | mithyaiṣa vyavasāyaste prakṛtistvāṃ niyokṣyati ||
Meaning
If, out of ego, you decide 'I will not fight', that decision is in vain; your own nature will push you into it.