Valmiki Ramayana Aranya Kanda Sarga 47 Shloka 49

अदुष्टभावा pure in thought, तन्वी slim, सा that, सुदुष्टम् forcefully, तं रजनीचरम् nightwalker, तत् that, वाक्यम् words, इति thus, उक्त्वा said, गात्रप्रकम्पात् due to trembling of the body, वातोद्धता shaken by violent wind, कदलीव banana, व्यथिता distressed, बभूव became.

Having said thus to the wicked nightwalker Ravana, Sita, pure in thought remained distressed.Her slender body started trembling like a banana plant becomes shaken by a violent wind.