Counteracting Kali yuga by Srila Prabhupada (SB 01.07.32-33) at Vrndavana, September 27, 1976

The Brahma Vaivarta Purana (related to Rathantara kalpa) mentions a ten thousand-year period, starting from the traditional dating of the Kali Yuga epoch, during which bhakti yogis will be present. Krishna foretold that Kali Yuga will be full of extreme hardships for people with ideals and values. Krishna said 5000 years ago : ""For 10,000 years of Kali such devotees of Mine will be present on earth. After the departure of My devotees there will be only one varna.""
Source : https://en.wikipedia.org/wiki/Kali_Yuga