Joshua 1:4
1:4 Your territory will extend from the wilderness in the south to Lebanon in the north. It will extend all the way to the great River Euphrates in the east (including all of Syria)
and all the way to the Mediterranean Sea
in the west.
Joshua 15:12
15:12 The western border was the Mediterranean Sea. These were the borders of the tribe of Judah and its clans.
Joshua 23:4
23:4 See, I have parceled out to your tribes these remaining nations,
from the Jordan to the Mediterranean Sea
in the west, including all the nations I defeated.
Numbers 34:6
The Western Border of the Land
34:6 “‘And for a western border you will have the Great Sea. This will be your western border.