One verse

Srimad Bhagavatam 1.15.36

1.15.36

यदा मुकुन्दो भगवानिमां महीं जहौ स्वतन्वा श्रवणीयसत्कथ: । तदाहरेवाप्रतिबुद्धचेतसा- मभद्रहेतु: कलिरन्ववर्तत ॥ ३६ ॥

yada mukundo bhagavan imam mahim jahau sva-tanva sravaniya-sat-kathah tadahar evapratibuddha-cetasam abhadra-hetuh kalir anvavartata

yada
when
mukundah
Lord Krsna
bhagavan
the Personality of Godhead
imam
this
mahim
earth
jahau
left
sva-tanva
with His selfsame body
sravaniya-sat-kathah
hearing about Him is worthwhile
tada
at that time
ahah eva
from the very day
aprati-buddha-cetasam
of those whose minds are not sufficiently developed
abhadra-hetuh
cause of all ill fortune
kalih anvavartata
Kali fully manifested.

When the Personality of Godhead, Lord Krsna, left this earthly plane in His selfsame form, from that very day Kali, who had already partially appeared, became fully manifest to create inauspicious conditions for those who are endowed with a poor fund of knowledge.