Numbers 34:6

And, for a west boundary, - ye shall have the great sea, even a boundary, this, shall serve you as west boundary.

Joshua 1:4

From the desert 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 in of the sun, shall be your boundary.

Joshua 9:1

And it came to pass, when they heard, - namely, all the kings who were over the Jordan, in the hill country and in the lowland, and in all the coast of the great sea, over against the Lebanon, - the Hittite, and the Amorite, the Canaanite, the Perizzite, the Hivite, and the Jebusite; -

Joshua 15:12

And, as a west boundary, are the great sea and coast. This, is the boundary of the sons of Judah, round about, by their families.

Joshua 15:47

Ashdod, her towns and her villages. Gaza, her towns and her villages, as far as the ravine of Egypt, - and the great sea and coast.

Joshua 23:4

Behold, I have allotted to you these nations which remain, as an inheritance, for your tribes, - from the Jordan, and all the nations which I have cut off, even unto the great sea, at the going in of the sun.

Ezekiel 47:10

And it shall come to pass that there shall stand by it fishers, from En-gedi even unto En-eglaim, places for spreading out nets, shall they be, - after their kind, shall be their fish, like the fish of the great sea exceeding many.

Ezekiel 47:15

This then shall be the boundary of the land, - on the north side, from the great sea by the way of Hethlon to the entering, in of Zedad;

Ezekiel 47:20

And for the west side, the great sea, from the boundary as far as over against the entering in of Hamath - this is 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 desert 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 in of the sun, shall be your boundary.
Joshua 9:1
And it came to pass, when they heard, - namely, all the kings who were over the Jordan, in the hill country and in the lowland, and in all the coast of the great sea, over against the Lebanon, - the Hittite, and the Amorite, the Canaanite, the Perizzite, the Hivite, and the Jebusite; -
Joshua 15:12
And, as a west boundary, are the great sea and coast. This, is the boundary of the sons of Judah, round about, by their families.
Joshua 23:4
Behold, I have allotted to you these nations which remain, as an inheritance, for your tribes, - from the Jordan, and all the nations which I have cut off, even unto the great sea, at the going in of the sun.
Ezekiel 47:10
And it shall come to pass that there shall stand by it fishers, from En-gedi even unto En-eglaim, places for spreading out nets, shall they be, - after their kind, shall be their fish, like the fish of the great sea exceeding many.