SB 5.21.6
Devanāgarī
यावद्दक्षिणायनमहानि वर्धन्ते यावदुदगयनं रात्रय: ॥ ६ ॥
Text
yāvad dakṣiṇāyanam ahāni vardhante yāvad udagayanaṁ rātrayaḥ.
Synonyms
yāvat—until;dakṣiṇa-ayanam—the sun passes to the southern side;ahāni—the days;vardhante—increase;yāvat—until;udagayanam—the sun passes to the northern side;rātrayaḥ—the nights.
Translation
Until the sun travels to the south the days grow longer, and until it travels to the north the nights grow longer.