Deuteronomy 27:26 - Ellicott's Commentary On The Whole Bible

Cursed be he that confirmeth not all the words of this law to do them. — “Here he sums up the whole Law, all of it, and they took it upon them with a curse and an oath” (Rashi). From this verse St. Paul also reasons that “as many as are of the works of the law are under a curse.” For no man can do all of them. And therefore it is impossible to secure the blessing of Gerizim except through Him who bare the curse of Ebal. “Christ hath redeemed us from the curse of the law, being made a curse for us, as it is written, cursed is every one that hangeth on a tree.” In all these curses the verb is wanting. “Cursed is he,” would be a more correct translation in modern English. These curses are not imprecations so much as declarations of fact.