'Treacherous' in the Bible

A grievous vision is declared unto me; the treacherous man dealeth treacherously, and the destroyer destroyeth. Go up, O Elam; besiege, O Media; all the sighing thereof have I made to cease.

From the uttermost part of the earth have we heard songs: Glory to the righteous. But I said, I pine away, I pine away, woe is me! the treacherous have dealt treacherously; yea, the treacherous have dealt very treacherously.