Bhagavad Gita 2.38

सुखदुःखे समे कृत्वा लाभालाभौ जयाजयौ।ततो युद्धाय युज्यस्व नैवं पापमवाप्स्यसि॥

sukhaduḥkhe same kṛtvā lābhālābhau jayājayau |tato yuddhāya yujyasva naivaṃ pāpamavāpsyasi ||

Having made pleasure and pain, gain and loss, victory and defeat equal, engage in battle for the sake of battle; thus, you shall not incur sin.

Look upon pleasure and pain, victory and defeat, with an equal eye. Be prepared for the combat, and you will commit no sin.

Our plain-language meaning of this verse is waiting for scholar review.