Valmiki Ramayana Aranya Kanda Sarga 18 Shloka 13

लक्ष्मणेन by Lakshmana, इति thus, उक्ता having spoken, कराला fierce, निर्णतोदरी drooping bellied woman, परिहासाविचक्षणा capable of making fun, सा that Surpanakha, तद्वचः those words, तथ्यम् to be true, मन्यते presumes

While Lakshmana was thus making fun of the dreadful, droopingbellied Surpanakha, she presumed his words to be true.