What is the ruling on a triple divorce contingent upon the brother not going to a specific place, knowing that the marriage has not yet been consummated?

Swearing by divorce is considered a conditional divorce by the majority of scholars, and the divorce takes effect upon the fulfillment of the condition. So, if your brother disobeys you and goes to the place you swore he wouldn't go to, then what you swore by regarding divorcing your wife three times becomes binding, and she becomes unlawful for you until she marries another husband. Her not having been consummated with is irrelevant. We advise your brother not to do what you swore he wouldn't do, and you should avoid swearing by divorce and being lenient with it.