Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 15


यदोक: सर्वभूतानां मही मग्ना महाम्भसि ।अस्या उद्धरणे यत्नो देव देव्या विधीयताम् ॥ १५ ॥


yad okaḥ sarva-bhūtānāṁmahī magnā mahāmbhasiasyā uddharaṇe yatnodeva devyā vidhīyatām


O master of the demigods, please attempt to lift the earth, which is merged in the great water, because it is the dwelling place for all the living entities. It can be done by your endeavor and by the mercy of the Lord.


The great water mentioned in this connection is the Garbhodaka Ocean, which fills half of the universe.