ei tina--sarvasraya, jagat-isvara
eho saba kala-amsa, krsna--adhisvara
ei tina—these three; sarva-asraya—the shelter of the whole material creation; jagat-isvara—supreme controllers of the universe; eho saba—all of Them; kala-amsa—plenary portions, or portions of the plenary portions; krsna—Lord Krsna; adhisvara—the Supreme Personality of Godhead.
"Although Maha-Visnu, Padmanabha and Ksirodakasayi Visnu are all shelters and controllers of the entire universe, They are nonetheless but plenary portions or portions of the plenary portions of Krsna. Therefore He is the original Personality of Godhead.
Link to this page: https://prabhupadabooks.com/cc/madhya/21/40