One verse

Srimad Bhagavatam 11.18.47

11.18.47

वर्णाश्रमवतां धर्म एष आचारलक्षण: । स एव मद्भ‍‍क्तियुतो नि:श्रेयसकर: पर: ॥ ४७ ॥

varṇāśramavatāṁ dharma eṣa ācāra-lakṣaṇaḥ sa eva mad-bhakti-yuto niḥśreyasa-karaḥ paraḥ

varṇāśrama-vatām
of the followers of the varṇāśrama system
dharmaḥ
religious principle
eṣaḥ
this
ācāra
by proper behavior according to the authorized tradition
lakṣaṇaḥ
characterized
saḥ
this
eva
indeed
mat-bhakti
with devotional service to Me
yutaḥ
conjoined
niḥśreyasa
the highest perfection of life
karaḥ
giving
paraḥ
supreme

Those who are followers of this varṇāśrama system accept religious principles according to authorized traditions of proper conduct. When such varṇāśrama duties are dedicated to Me in loving service, they award the supreme perfection of life.