Bhagavad Gita 12.18

समः शत्रौ च मित्रे च तथा मानापमानयोः।शीतोष्णसुखदुःखेषु समः सङ्गविवर्जितः॥

samaḥ śatrau ca mitre ca tathā mānāpamānayoḥ |śītoṣṇasukhaduḥkheṣu samaḥ saṅgavivarjitaḥ ||

He who is the same to foe and friend, and also in honor and dishonor, who is the same in cold and heat, in pleasure and pain, and who is free from attachment.

He to whom friend and foe are alike, who welcomes equally honor and dishonor, heat and cold, pleasure and pain, and who is enamored of nothing—

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