'Deal' in the Bible

“Do we not all have one father? Has not one God created us? Why do we deal treacherously each against his brother so as to profane the covenant of our fathers?

But not one has done so who has a remnant of the Spirit. And what did that one do while he was seeking a godly offspring? Take heed then to your spirit, and let no one deal treacherously against the wife of your youth.

For I hate divorce,” says the Lord, the God of Israel, “and him who covers his garment with wrong,” says the Lord of hosts. “So take heed to your spirit, that you do not deal treacherously.”