'Deal Treacherously' in the Bible
Yes, let none who trust and wait hopefully and look for You be put to shame or be disappointed; let them be ashamed who forsake the right or deal treacherously without cause.
From the uttermost parts of the earth have we heard songs: Glory to the Righteous One [and to the people of Israel]! But I say, Emaciated I pine away, I pine away. Woe is me! The treacherous dealers deal treacherously! Yes, the treacherous dealers deal very treacherously.
Woe to you, O destroyer, you who were not yourself destroyed, who deal treacherously though they [your victims] did not deal treacherously with you! When you have ceased to destroy, you will be destroyed; and when you have stopped dealing treacherously, they will deal treacherously with you.
And did not God make [you and your wife] one [flesh]? Did not One make you and preserve your spirit alive? And why [did God make you two] one? Because He sought a godly offspring [from your union]. Therefore take heed to yourselves, and let no one deal treacherously and be faithless to the wife of his youth.
Their throat is a yawning grave; they use their tongues to deceive (to mislead and to deal treacherously). The venom of asps is beneath their lips.