Śrī Caitanya Caritamrta · Text Madhya 20.323
অনন্ত ব্রহ্মাণ্ডে ঐছে করহ গণন ।
মহাবিষ্ণু একশ্বাসে ব্রহ্মার জীবন ॥ ৩২৩ ॥
ananta brahmāṇḍe aiche karaha gaṇana
mahā-viṣṇu eka-śvāse brahmāra jīvana
“The number of manvantara-avatāras for only one universe has been given. One can only imagine how many manvantara-avatāras exist in the innumerable universes. And all these universes and Brahmās exist only during one exhalation of Mahā-Viṣṇu.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.