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Text 6
yāvad dakṣiṇāyanam ahāni vardhante yāvad udagayanaṁ rātrayaḥ.
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.
Until the sun travels to the south the days grow longer, and until it travels to the north the nights grow longer.