(I offer my respects to Radharani, whose bodily complexion is like molten gold and who is the Queen of Vrndavana. You are the daughter of King Vrsabhanu, and You are very dear to Lord Krsna.)
Verse quoted by Lord Caitanya, from the Brhan-Naradiya Purana:
(Chant the holy name, chant the holy name, chant the holy name. There is no other alternative, there is no other alternative, there is no other alternative for God realization in the Age of Kali.)