My dear Lord, at the end of each millennium the Supreme Personality of Godhead Garbhodakaśāyī Viṣṇu dissolves everything manifested within the universe into His belly. He lies down on the lap of Śeṣa Nāga, from His navel sprouts a golden lotus flower on a stem, and on that lotus Lord Brahmā is created. I can understand that You are the same Supreme Godhead. I therefore offer my respectful obeisances unto You.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कल्पान्त एतदखिलं जठरेण गृह्णन् शेते पुमान् स्वदृगनन्तसखस्तदङ्के । यन्नाभिसिन्धुरुहकाञ्चनलोकपद्म- गर्भे द्युमान् भगवते प्रणतोऽस्मि तस्मै
kalpānta etadakhilaṃ jaṭhareṇa gṛhṇan śete pumān svadṛganantasakhastadaṅke | yannābhisindhuruhakāñcanalokapadma- garbhe dyumān bhagavate praṇato'smi tasmai
SB 4.9.14