 Judas regretted what he had done to our Lord. Listen as I read it to you. Then Judas, his betrayer, seeing that he had been condemned, was remorseful. There's your word, metamelomai, and brought back the 30 pieces of silver to the chief priests and to the elders. So Judas made a mistake. He realized he had been conned and been used, and he was repentant of that. Meta what? Metamelomai. He regretted it.