Śrīmad-Bhāgavatam · Text 12.3.30
Who is speaking and story frame
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
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.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.