Valmiki Ramayana Ayodhya Kanda Sarga 63 Shloka 20

जलदागमे at the advent of the rainy season, स्रोतांसि streams, विमलान्यपि although pure, आकुलारुण तोयानि mixed up with marshy red soil, उन्मार्गजलवाहिनी by flowing in different directions, बभूवुः became.

The streams that were pure, mixed with red soil flowed red, deviating from their natural course.