Caitanya-caritāmṛta 20.329
yugāvatāra ebe śuna, sanātana satya-tretā-dvāpara-kali-yugera gaṇana
[yugaavataara ebe shuna, sanaatana satya-tretaa-dvaapara-kali-yugera ganana]
Blended reading (Sanskrit + English inline)
yugāvatāra ebe śuna, sanātana satya-tretā-dvāpara-kali-yugera gaṇana
“O Sanātana, now hear from Me about the yuga-avatāras, the incarnations for the millenniums. First of all, there are four yugas — Satya-yuga, Tretā-yuga, Dvāpara-yuga and Kali-yuga.
My note
Source: vedabase.io