One verse

Srimad Bhagavatam 5.21.5

5.21.5

यदा वृश्चिकादिषु पञ्चसु वर्तते तदाहोरात्राणि विपर्ययाणि भवन्ति ॥ ५ ॥

yada vrscikadisu pancasu vartate tadaho-ratrani viparyayani bhavanti.

yada
when
vrscika-adisu
headed by Vrscika (Scorpio)
pancasu
five
vartate
remains
tada
at that time
ahah-ratrani
the days and nights
viparyayani
the opposite (the duration of the day decreases, and that of night increases)
bhavanti
are.

When the sun passes through the five signs beginning with Vrscika (Scorpio), the duration of the days decreases (until Capricorn), and then gradually it increases month after month, until day and night become equal (in Aries).