One verse

Bhagavad Gita 2.15

2.15

यं हि न व्यथयन्त्येते पुरुषं पुरुषर्षभ | समदुःखसुखं धीरं सोऽमृतत्वाय कल्पते ||२-१५||

yaṃ hi na vyathayantyete puruṣaṃ puruṣarṣabha . samaduḥkhasukhaṃ dhīraṃ so.amṛtatvāya kalpate ||2-15||

yam
one to whom
hi
certainly
na
never
vyathayanti
are distressing
ete
all these
puruṣam
to a person
puruṣa-ṛṣabha
O best among men
sama
unaltered
duḥkha
in distress
sukham
and happiness
dhīram
patient
saḥ
he
amṛtatvāya
for liberation
kalpate
is considered eligible
na
never

O best among men [Arjuna], the person who is not disturbed by happiness and distress and is steady in both is certainly eligible for liberation.