King James Version (KJV)
Thus will I make mount Seir most desolate, and cut off from it him that passeth out and him that returneth. {most...: Heb. desolation and desolation}
Modern English
Thus will I make Mount Seir an astonishment and a desolation. I will cut off from it him who passes through and him who returns.
Hebrew
וְנָֽתַתִּי֙ אֶת־הַ֣ר שֵׂעִ֔יר לְשִֽׁמְמָ֖ה וּשְׁמָמָ֑ה וְהִכְרַתִּ֥י מִמֶּ֖נּוּ עֹבֵ֥ר וָשָֽׁב׃
vnatatiy ʾet-har sheʿiyr lshimmah vshmamah vhikratiy mimenv ʿober vashab