הלכה אויף מלכים א 2:8

The king has the right to execute anyone who rebels against a king. One is liable to the death penalty even if the king decreed that he is to go to a particular place and he did not go there or that he not leave his house and left. If he so wishes, he may execute him it says, “any man who disagrees with your words” (Joshua 1:18). Similarly, the king has permission to execute anyone who disgraces²⁴Or, embarrasses. him or insults him, as was the case with Shimi ben Gera. The king has permission to execute only by the sword. He may imprison and beat someone with a whip for the sake of his honor. However, he may not declare their money ownerless, for it would be robbery were he to do so.