Caitanya-caritāmṛta 1.267
brahmāṇḍa-bhitare haya caudda bhuvana caudda-bhuvane vaise yata jīva-gaṇa
[brahmaanda-bhitare haya chaudda bhuvana chaudda-bhuvane vaise yata jeeva-gana]
Blended reading (Sanskrit + English inline)
brahmāṇḍa-bhitare haya caudda bhuvana caudda-bhuvane vaise yata jīva-gaṇa
There are fourteen planetary systems within the universe, and all living entities reside in those planetary systems.
My note
Source: vedabase.io