Brihat Samhita
रूक्षः श्वेतो विप्रान्रक्तऽभः क्षत्रियान्विनाशयति । पीतो वैश्यान्कृष्णस्ततो अपरान्शुभकरः स्निग्धः ॥ ३-२५ ॥
If, in Varṣā, when the rays are sharp, the sun be white then the Brāhmins, if of blood colour the Kṣatriyas, if yellow the Vaiśyas, and if black the Śūdras will perish. If, as said above, the rays be soft, mankind will be happy.
english translation
rUkSaH zveto viprAnrakta'bhaH kSatriyAnvinAzayati । pIto vaizyAnkRSNastato aparAnzubhakaraH snigdhaH ॥ 3-25 ॥
hk transliteration by Sanscript