Many of us have heard about the ten thousand years of prosperity in the early part of Kali yuga. One place this prediction is found is in the Brahma Vivarta Purana, texts 59 and 60: “For 10,000 years of kali such devotees of mine will fill the whole planet. After the departure of My devotees there will only be one varna [outcaste]. Devoid of My devotees, the earth will be shackled by kali. Saying this Krishna departed.”