Rashi on Numbers 34:9/רש"י על במדבר ל״ד:ט׳

1והיו תוצאתיו חצר עינן AND THE GOINGS OUT OF IT SHALL BE AT HAZAR-ENAN — This place was the end of the northern boundary. It follows therefore that Hazar-Enan was in the north-east corner. And from there, “you shall then turn yourselves" toward the eastern border.