Brihat Samhita
बन्धूकपुष्पाञ्जनचूर्णसन्निभं सान्ध्यं रजो अभ्येति यदा दिवाकरम् । लोकास्तदा रोगशतैर्निपीड्यते शुक्लं रजो लोकविवृद्धिशान्तये ॥ ३०-१५ ॥
If the dust raised by the wind at sunrise or suset should be very red or very black, and if such dust should appear to move in the direction of the Sun, mankind will suffer from various diseases; if the dust should be white, there will be happiness in the land.
english translation
bandhUkapuSpAJjanacUrNasannibhaM sAndhyaM rajo abhyeti yadA divAkaram । lokAstadA rogazatairnipIDyate zuklaM rajo lokavivRddhizAntaye ॥ 30-15 ॥
hk transliteration by Sanscript