B.G 2.56

दुःखेष्वनुद्विग्नमनाः सुखेषु विगतस्पृहः। वीतरागभयक्रोधः स्थितधीर्मुनिरुच्यते ॥२-५६॥

duḥkhēṣvanudvignamanāḥ sukhēṣu vigataspr̥haḥ। vītarāgabhayakrōdhaḥ sthitadhīrmunirucyatē ॥2-56॥

[दुःखेषु अनुद्विग्न मनाः सुखेषु विगत स्पृहः। वीत राग भय क्रोधः स्थितधीः मुनिः उच्यते॥ #br duḥkhēṣu = by the sorrow; anudvigna = unperturbed; manāḥ = who pocesses mind; sukhēṣu = for pleasures; vigata spr̥haḥ = devoid of desires; vīta = free from; rāga = passion; bhaya = fear; krōdhaḥ = anger; sthitadhīḥ = who is established in steadfast wisdom; muniḥ = muni i.e monk; ucyatē = is called;]

He whose mind remains unperturbed in sorrow and devoid of desires for pleasures, who is free from passion, fear, and anger, and who is established in steadfast wisdom is called a 'muni', i.e. sage.