Chapter 2 · verse 15 · gita.yoga.org

Bhagavad Gita 2.15

यं हि न व्यथयन्त्येते पुरुषं पुरुषर्षभ। समदुःखसुखं धीरं सोऽमृतत्वाय कल्पते

That firm man, whom surely these afflictions do not, O chief among men, to whom pleasure and pain are the same, is fit for attaining immortality.