'Bowels' in the Bible

and thou shalt have great sickness by disease of thy bowels, until thy bowels fall out by reason of the sickness, day by day.

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

And it came to pass, in process of time, at the end of two years, that his bowels fell out by reason of his sickness, and he died of sore diseases. And his people made no burning for him, like the burning of his fathers.

And Jehovah sent an angel, who cut off all the mighty men of valor, and the leaders and captains, in the camp of the king of Assyria. So he returned with shame of face to his own land. And when he was come into the house of his god, they that came forth from his own bowels slew him there with the sword.