20.339
ei mantre dvapare kare krsnarcana
’krsna-nama-sankirtana’--kali-yugera dharma
SYNONYMS
ei mantre—by this mantra; dvapare—in the age of Dvapara; kare—perform; krsna-arcana—the worship of Lord Krsna; krsna-nama-sankirtana—chanting of the holy name of Lord Krsna; kali-yugera dharma—the occupational duty in the Age of Kali "By this mantra, the people worship Lord Krsna in the Dvapara-yuga.
In the Kali-yuga the occupational duty of the people is to chant congregationally the holy name of Krsna.
PURPORT
As stated in Srimad-Bhagavatam (12.3.51):
kaler dosa-nidhe rajann
asti hy eko mahan gunah
kirtanad eva krsnasya
mukta-sangah param vrajet In Kali-yuga one worships Lord Krsna by chanting Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare Hare Rama, Hare Rama, Rama Rama, Hare Hare.
To propagate this movement, Lord Krsna personally appeared as Lord Caitanya Mahaprabhu.
That is described in the following verse.