'Treacherously' in the Bible

Have we not all one father? Hath not our God prepared us? Wherefore do we deal treacherously, Each against his brother, To pollute the covenant of our fathers?

Dealt treacherously hath Judah, And abomination hath been done in Israel, and in Jerusalem, For polluted hath Judah the holy thing of Jehovah, That He hath loved, and hath married the daughter of a strange god.

And ye have said, 'Wherefore?' Because Jehovah hath testified between thee And the wife of thy youth, That thou hast dealt treacherously against her, And she thy companion, and thy covenant-wife.

And He did not make one only, And He hath the remnant of the Spirit. And what is the one alone! He is seeking a godly seed. And ye have been watchful over your spirit, And with the wife of thy youth, None doth deal treacherously.

For I hate sending away, said Jehovah, God of Israel, And He who hath covered violence with his clothing, said Jehovah of Hosts, And ye have been watchful over your spirit, And ye do not deal treacherously.