CATVARI TRINI DVE CAIKAM
KRTADISU YATHA-KRAMAM
SANKHYATANI SAHASRANI
DVI-GUNANI SATANI CA...text # 24,chp # 3, Third Canto(THE STATUS QUO), shrimad bhagavatam
TRANSLATION:"THE DURATION OF THE SATYA MILLENNIUM EQUALS 4,800 YEARS OF THE DEMIGODS; THE DURATION OF THE TETRA MILLENNIUM EQUALS 3,600 YEARS OF THE DEMIGODS; THE DURATION OF THE DVAPARA MILLENNIUM EQUALS 2,400; AND THAT OF THE KALI MILLENNIUM IS 1,200 YEARS OF THE DEMIGODS."