With an incurable disease. — This is correct. Literally, to a disease, to want of healing. (Comp. 2 Chronicles 36:16.) The Syriac and Arabic make 2 Chronicles 21:16-18 part of the prophecy.
Related Commentaries of 2 Chronicles 21:18
2 Chronicles 21:18
18 And after all this the LORD smote him in his bowels with an incurable disease.