Numbers 34:6

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

Joshua 1:4

From the wilderness and this Lebanon even unto the great river, the river Euphrates, all the land of the Hittites and unto the great sea toward the going down of the sun shall be your borders.

Joshua 9:1

And it came to pass when all the kings who were on this side of the Jordan, in the mountains and in the valleys and in all the coast of the great sea over against Lebanon, heard these things, the Hittites and the Amorites the Canaanites, the Perizzites, the Hivites, and the Jebusites

Joshua 15:12

And the west border is the great sea. This is the border of the sons of Judah round about according to their families.

Joshua 15:47

Ashdod with her towns and her villages, Gaza with her towns and her villages, unto the river of Egypt and the great sea and the border thereof;

Joshua 23:4

Behold, I have divided unto you as inheritance unto your tribes all these Gentiles, those that remain as well as those that are destroyed, from the Jordan unto the great sea towards the going down of the sun.

Ezekiel 47:10

And it shall come to pass, that the fishermen shall stand next to it; and from Engedi even unto Eneglaim there shall be a place to spread forth nets; according to their kinds, their fish shall be as the fish of the great sea, exceeding many.

Ezekiel 47:15

And this shall be the border of the land toward the north side, from the great sea, the way of Hethlon, as men go to Zedad;

Ezekiel 47:20

And to the west side the great sea shall be the border straight unto Hamath. This shall be the west side.

Treasury of Scripture Knowledge

Summary

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

Bible References

General references

Joshua 1:4
From the wilderness and this Lebanon even unto the great river, the river Euphrates, all the land of the Hittites and unto the great sea toward the going down of the sun shall be your borders.
Joshua 9:1
And it came to pass when all the kings who were on this side of the Jordan, in the mountains and in the valleys and in all the coast of the great sea over against Lebanon, heard these things, the Hittites and the Amorites the Canaanites, the Perizzites, the Hivites, and the Jebusites
Joshua 15:12
And the west border is the great sea. This is the border of the sons of Judah round about according to their families.
Joshua 23:4
Behold, I have divided unto you as inheritance unto your tribes all these Gentiles, those that remain as well as those that are destroyed, from the Jordan unto the great sea towards the going down of the sun.
Ezekiel 47:10
And it shall come to pass, that the fishermen shall stand next to it; and from Engedi even unto Eneglaim there shall be a place to spread forth nets; according to their kinds, their fish shall be as the fish of the great sea, exceeding many.