'Disguising' in the Bible

Then Yahweh said to Ahijah, "Look, the wife of Jeroboam [is] coming to seek a word from you about her son, for he [is] ill. {Thus and so} you shall say to her. When she comes, she [will be] disguising herself."

For such people [are] false apostles, deceitful workers, disguising themselves as apostles of Christ.