## the people looked and saw that he had sackcloth underneath, against his skin ##
By wearing sackcloth even for his undergarments, the king showed that he was very sad and upset. AT: "The people could see that the king had rough undergarments on, because he had torn his outer clothes."
The king is saying he hopes God will punish him or even kill him if Elisha the prophet does not die because of the things that have happened in the city of Samaria. AT: "May God punish me and even kill me, if Elisha, son of Shaphat, does not die today." (See: [[rc://en/ta/man/translate/figs-euphemism]])