SB 12.2.29
visnor bhagavato bhanuh
krsnakhyo ’sau divam gatah
tadavisat kalir lokam
pape yad ramate janah
Translation:
The Supreme Lord, Visnu, is brilliant like the sun and is known as Krsna. When He returned to the spiritual sky, Kali entered this world, and people then began to take pleasure in sinful activities.