One verse

Srimad Bhagavatam 5.14.30

5.14.30

यदा पाखण्डिभिरात्मवञ्चितैस्तैरुरु वञ्चितो ब्रह्मकुलं समावसंस्तेषां शीलमुपनयनादिश्रौतस्मार्तकर्मानुष्ठानेन भगवतो यज्ञपुरुषस्याराधनमेव तदरोचयन् शूद्रकुलं भजते निगमाचारेऽशुद्धितो यस्य मिथुनीभाव: कुटुम्बभरणं यथा वानरजाते: ॥ ३० ॥

yada pakhandibhir atma-vancitais tair uru vancito brahma-kulam samavasams tesam silam upanayanadi-srauta-smarta-karmanustha-nena bhagavato yajna-purusasyaradhanam eva tad arocayan sudra-kulam bhajate nigamacare ’suddhito yasya mithuni-bhavah kutumba-bharanam yatha vanara-jateh.

yada
when
pakhandibhih
by pasandis (godless atheists)
atma-vancitaih
who themselves are cheated
taih
by them
uru
more and more
vancitah
being cheated
brahma-kulam
the bona fide brahmanas strictly following the Vedic culture
samavasan
settling among them to advance spiritually
tesam
of them (the brahmanas who strictly follow Vedic principles)
silam
the good character
upanayana-adi
beginning with offering the sacred thread or training the conditioned soul to qualify as a bona fide brahmana
srauta
according to the Vedic principles
smarta
according to the authorized scriptures derived from the Vedas
karma-anusthanena
the performance of activities
bhagavatah
of the Supreme Personality of Godhead
yajna-purusasya
who is worshiped by Vedic ritualistic ceremonies
aradhanam
the process of worshiping Him
eva
certainly
tat arocayan
not finding pleasure in it due to its being difficult for unscrupulous persons to perform
sudra-kulam
the society of sudras
bhajate
he turns to
nigama-acare
in behaving according to Vedic principles
asuddhitah
not purified
yasya
of whom
mithuni-bhavah
sex enjoyment or the materialistic way of life
kutumba-bharanam
the maintenance of the family
yatha
as it is
vanara-jateh
of the society of monkeys, or the descendants of the monkey

The pseudo svamis, yogis and incarnations who do not believe in the Supreme Personality of Godhead are known as pasandis. They themselves are fallen and cheated because they do not know the real path of spiritual advancement, and whoever goes to them is certainly cheated in his turn. When one is thus cheated, he sometimes takes shelter of the real followers of Vedic principles (brahmanas or those in Krsna consciousness), who teach everyone how to worship the Supreme Personality of Godhead according to the Vedic rituals. However, being unable to stick to these principles, these rascals again fall down and take shelter among sudras who are very expert in making arrangements for sex indulgence. Sex is very prominent among animals like monkeys, and such people who are enlivened by sex may be called descendants of monkeys.