One verse

Srimad Bhagavatam 5.6.4

5.6.4

नित्यं ददाति कामस्यच्छिद्रं तमनु येऽरय: । योगिन: कृतमैत्रस्य पत्युर्जायेव पुंश्चली ॥ ४ ॥

nityam dadati kamasya cchidram tam anu ye ’rayah yoginah krta-maitrasya patyur jayeva pumscali

nityam
always
dadati
gives
kamasya
of lust
chidram
facility
tam
that (lust)
anu
following
ye
those
arayah
enemies
yoginah
of the yogis or persons trying to advance in spiritual life
krta-maitrasya
having put faith in the mind
patyuh
of the husband
jaya iva
like the wife
pumscali
who is unchaste or easily carried away by other men.

An unchaste woman is very easily carried away by paramours, and it sometimes happens that her husband is violently killed by her paramours. If the yogi gives his mind a chance and does not restrain it, his mind will give facility to enemies like lust, anger and greed, and they will doubtlessly kill the yogi.