One verse

Srimad Bhagavatam 12.4.5

12.4.5

द्विपरार्धे त्वतिक्रान्ते ब्रह्मण: परमेष्ठिन: । तदा प्रकृतय: सप्त कल्पन्ते प्रलयाय वै ॥ ५ ॥

dvi-parārdhe tv atikrānte brahmaṇaḥ parameṣṭhinaḥ tadā prakṛtayaḥ sapta kalpante pralayāya vai

dvi-parārdhe
two parārdhas
tu
and
atikrānte
when they have become completed
brahmaṇaḥ
of Lord Brahmā
parame-sthinaḥ
the most highly situated living entity
tadā
then
prakṛtayaḥ
the elements of nature
sapta
seven
kalpante
are subject
pralayāya
to destruction
vai
indeed

When the two halves of the lifetime of Lord Brahmā, the most elevated created being, are complete, the seven basic elements of creation are annihilated.