Rashi on Numbers 34:10/רש"י על במדבר ל״ד:י׳

1והתאויתם לכם YOU SHALL TURN YOURSELVES to the eastern boundary. והתאויתם denotes turning round, just the same as תתאו (v. 7).

2שפמה TO SHEPAM on the eastern boundary, and from there to Riblah.