BT Ḥul 111a(9) :דהא רב הונא חלטי ליה בחלא ורב נחמ׳ חלטי ליה ברותחין‏ : they used to treat (the blood vessels in the liver) for PN with vinegar. They used to treat (them) for PN2 with boiling water
See the entire entry for ḥlṭ#3 vb. to treat with hot liquid