One verse

Srimad Bhagavatam 1.2.13

1.2.13

अत: पुम्भिर्द्विजश्रेष्ठा वर्णाश्रमविभागश: । स्वनुष्ठितस्य धर्मस्य संसिद्धिर्हरितोषणम् ॥ १३ ॥

atah pumbhir dvija-srestha varnasrama-vibhagasah svanusthitasya dharmasya samsiddhir hari-tosanam

atah
so
pumbhih
by the human being
dvija-sresthah
O best among the twice-born
varna-asrama
the institution of four castes and four orders of life
vibhagasah
by the division of
svanusthitasya
of one’s own prescribed duties
dharmasya
occupational
samsiddhih
the highest perfection
hari
the Personality of Godhead
tosanam
pleasing.

O best among the twice-born, it is therefore concluded that the highest perfection one can achieve by discharging the duties prescribed for one’s own occupation according to caste divisions and orders of life is to please the Personality of Godhead.