What does 2 Samuel 19:26 mean?

Mephibosheth answered, 'My servant tricked me. I told him to saddle a donkey for me so I could go with you, since I can’t walk well. But he left me behind and lied about me to you.' 2 Samuel 19:26 - Modern Text Bible

(Mephibosheth explains that Ziba, his servant, deceived him and slandered him to David.)