2 Chronicles 21:18

And after all this Yahweh afflicted him in his bowels with an illness for [which there was] no cure.

2 Chronicles 21:15

and you yourself [will be afflicted] with great illness, with sickness in your bowels, until your bowels come out on account of the illness, day by day.'"

2 Kings 9:29

In the eleventh year of Joram the son of Ahab, Ahaziah had become king over Judah.

Acts 12:23

And immediately an angel of the Lord struck him down {because} he did not give the glory to God. And he was eaten by worms [and] died.

Treasury of Scripture Knowledge

Summary

And after all this the LORD smote him in his bowels with an incurable disease.

Bible References

An incurable disease

2 Chronicles 21:15
and you yourself [will be afflicted] with great illness, with sickness in your bowels, until your bowels come out on account of the illness, day by day.'"
2 Kings 9:29
In the eleventh year of Joram the son of Ahab, Ahaziah had become king over Judah.
Acts 12:23
And immediately an angel of the Lord struck him down {because} he did not give the glory to God. And he was eaten by worms [and] died.