One verse

Srimad Bhagavatam 12.3.30

12.3.30

यदा मायानृतं तन्द्रा निद्रा हिंसा विषादनम् । शोकमोहौ भयं दैन्यं स कलिस्तामस: स्मृत: ॥ ३० ॥

yadā māyānṛtaṁ tandrā nidrā hiṁsā viṣādanam śoka-mohau bhayaṁ dainyaṁ sa kalis tāmasaḥ smṛtaḥ

yadā
when
māyā
deceit
anṛtam
false speech
tandrā
sloth
nidrā
sleep and intoxication
hiṁsā
violence
viṣādanam
depression
śoka
lamentation
mohau
and delusion
bhayam
fear
dainyam
poverty
saḥ
that
kaliḥ
the Age of Kali
tāmasaḥ
in the mode of ignorance
smṛtaḥ
is considered

When there is a predominance of cheating, lying, sloth, sleepiness, violence, depression, lamentation, bewilderment, fear and poverty, that age is Kali, the age of the mode of ignorance.