BT Ḥul 93b(20) :חד א׳ נורא מישב שאיב ליה וחד א׳ מצמ{{י}}ת צמית לה‏ : one says that fire in fact desiccates it (or: draws the blood out), and one says it just contracts it
See the entire entry for šwb vb. to be dried out by heat