Valmiki Ramayana Ayodhya Kanda Sarga 33 Shloka 9

अङ्गरागोचिताम् used to fragrant unguents, रक्तचन्दन सेविनीम् smeared with red sandalpaste, सीताम् Sita, वर्षम् rain, उष्णं च heat, शीतं च cold, आशु quickly, विवर्णताम् discoloured, नेष्यन्ति will render.

Sita who used to apply fragrant unguents and smear the body with redsandal cream will now be exposed to the rain, the heat and the cold which will quickly discolour her body.