Bhagavatapurana 2.9.32

2.9.32

aham evāsam evāgre nānyadyat sadasat param /
paścādahaṃ yadetac ca yo 'vaśiṣyeta so 'smyaham //

32. In the beginning, truly I alone was in existence; nothing else; neither the subtle nor the gross things; nor their cause Prakriti; afterwards (i.e., after creation), what exists is Myself; it is Myself that exists; all this world is Myself; what remains after Pralaya is Myself.