Numbers 34:6 KJV

And as for the western border, ye shall even have the great sea for a border: this shall be your west border.
Numbers 34:6, King James Version

In context

5 And the border shall fetch a compass from Azmon unto the river of Egypt, and the goings out of it shall be at the sea.

6 And as for the western border, ye shall even have the great sea for a border: this shall be your west border.

7 And this shall be your north border: from the great sea ye shall point out for you mount Hor: