One verse

Srimad Bhagavatam 8.24.32

8.24.32

श्रीभगवानुवाच सप्तमे ह्यद्यतनादूर्ध्वमहन्येतदरिंदम । निमङ्‌क्ष्यत्यप्ययाम्भोधौ त्रैलोक्यं भूर्भुवादिकम् ॥ ३२ ॥

sri-bhagavan uvaca saptame hy adyatanad urdhvam ahany etad arindama nimanksyaty apyayambhodhau trailokyam bhur-bhuvadikam

sri-bhagavan uvaca
the Supreme Personality of Godhead said
saptame
on the seventh
hi
indeed
adyatanat
from today
urdhvam
forward
ahani
on the day
etat
this creation
arimdama
O King who can subdue your enemies
nimanksyati
shall be inundated
apyaya-ambhodhau
in the ocean of destruction
trailokyam
the three lokas
bhuh-bhuva-adikam
namely Bhurloka, Bhuvarloka and Svarloka.

The Supreme Personality of Godhead said: O King, who can subdue your enemies, on the seventh day from today the three worlds—Bhuh, Bhuvah and Svah—will all merge into the water of inundation.