Bhagavad Gita 2.56
The sage whose mind is unruffled in suffering, whose desire is not aroused by enjoyment, who is without attachment, anger, or fear—take him to be one who stands at a lofty level.
दुःखेष्वनुद्विग्नमनाः सुखेषु विगतस्पृहः।
वीतरागभयक्रोधः स्थितधीर्मुनिरुच्यते॥duḥkheṣvanudvignamanāḥ sukheṣu vigataspṛhaḥ|
vītarāgabhayakrodhaḥ sthitadhīrmunirucyate||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).