Zechariah 3:4

Take away the filthy garments, &c.— These filthy garments denote the sins and pollution of the people, whose representative Joshua was; and the taking them away denotes God's pardoning the public and national sins of the Jews, and his restoring them to his favour and protection. The Jews used to change their garments under any public calamity; which calamity being over, they expressed the change of their condition, and the greatness of their joy, by clothing themselves in garments adapted to their circumstances. See Calmet.