Caitanya-caritāmṛta 5.110
nārāyaṇera nābhi-nāla-madhyete dharaṇī dharaṇīra madhye sapta samudra ye gaṇi
[naaraayanera naabhi-naala-madhyete dharanee dharaneera madhye sapta samudra ye gani]
Blended reading (Sanskrit + English inline)
nārāyaṇera nābhi-nāla-madhyete dharaṇī dharaṇīra madhye sapta samudra ye gaṇi
The material planets rest within the stem that grows from the lotus navel of Lord Nārāyaṇa. Among these planets are seven oceans.
My note
Source: vedabase.io