Bhagavad Gita Chapter 18 Verse 59

Gita 18.59

यत्, अहंकारम्, आश्रित्य, न, योत्स्ये, इति, मन्यसे,
मिथ्या, एषः, व्यवसायः, ते, प्रकृतिः, त्वाम्, नियोक्ष्यति।।59।।

Gita 18.59

Yat’, ahankaarm’, aashritya, na, yotsye, iti, manyase,
Mithya, eshH, vyavasaayH, te, prakritiH, tvaam’, niyokshyati ||59||

Translation: (Yat’) this that (ahankaarm’) ego (aashritya) taking shelter of / out of (iti) this (manyase) are thinking that (na, yotsye) I will not fight (te) your (eshH) this (vyavasaayH) resolve (mithya) is false, because your (prakritiH) Kshatriya nature (tvaam’) you (niyokshyati) will compel to fight. (59)

Translation: If, out of ego, you are thinking this that ‘I willl not fight’, this resolve of yours is false because your Kshatriya nature will compel you to fight.