Ibn Ezra on Numbers 34:6

הים הגדול. הספרדי והטעם גבול מערב נחלתכם והיה הים הגדול והוא הגבול בעצמו: THE GREAT SEA. The Spanish sea.⁵I.E.’s term for the Mediterranean Sea. The meaning of our verse is: And the Great Sea shall be your western border.⁶Our verse reads, u-gavel yam. This should be rendered, and for the western border not, and the sea. The word yam can mean either the sea or the west. Hence I.E.’s comment. The Great Sea itself shall serve as the border.⁷Our verse literally reads, and the border on the west, ye shall have the Great Sea, and a border. I.E. renders this, you shall have the Great Sea itself serve as your border on the west