One verse

Srimad Bhagavatam 3.22.4

3.22.4

अतो ह्यन्योन्यमात्मानं ब्रह्म क्षत्रं च रक्षत: । रक्षति स्माव्ययो देव: स य: सदसदात्मक: ॥ ४ ॥

ato hy anyonyam atmanam brahma ksatram ca raksatah raksati smavyayo devah sa yah sad-asad-atmakah

atah
hence
hi
certainly
anyonyam
each other
atmanam
the self
brahma
the brahmanas
ksatram
the ksatriyas
ca
and
raksatah
protect
raksati sma
protects
avyayah
immutable
devah
the Lord
sah
He
yah
who
sat-asat-atmakah
the form of the cause and effect.

That is why the brahmanas and ksatriyas protect each other, as well as themselves; and the Lord Himself, who is both the cause and effect and is yet immutable, protects them through each other.