How can you trust them? If they prevail against you, they respect neither treaty nor ties of relationship. They just flatter you with their tongues, but their hearts reject you, and most of them are transgressors.
Meaning:-
Prevail: prove more powerful than opposing forces; be victorious.
Treaty: agreement, contract, covenant,
Flatter: to praise someone in order to make them feel attractive or important.
Transgressors: a person who is actually breaking the law, offend; sin.