Joshua 15:4

Then on to Azmon, ending at the stream of Egypt: and the end of the limit is at the sea; this will be your limit on the south.

Numbers 34:5

And from Azmon it will go round to the stream of Egypt as far as the sea.

Joshua 13:3

From the Shihor, which is before Egypt, to the edge of Ekron to the north, which is taken to be Canaanite property: the five chiefs of the Philistines; the Gazites, and the Ashdodites, the Ashkelonites, the Gittites, and the Ekronites, as well as the Avvim;

Genesis 15:18

In that day the Lord made an agreement with Abram, and said, To your seed have I given this land from the river of Egypt to the great river, the river Euphrates:

Exodus 23:31

I will let the limits of your land be from the Red Sea to the sea of the Philistines, and from the waste land to the river Euphrates: for I will give the people of those lands into your power; and you will send them out before you.

Treasury of Scripture Knowledge

Summary

From thence it passed toward Azmon, and went out unto the river of Egypt; and the goings out of that coast were at the sea: this shall be your south coast.

Azmon

Bible References

Azmon

Numbers 34:5
And from Azmon it will go round to the stream of Egypt as far as the sea.

River

Joshua 13:3
From the Shihor, which is before Egypt, to the edge of Ekron to the north, which is taken to be Canaanite property: the five chiefs of the Philistines; the Gazites, and the Ashdodites, the Ashkelonites, the Gittites, and the Ekronites, as well as the Avvim;
Exodus 23:31
I will let the limits of your land be from the Red Sea to the sea of the Philistines, and from the waste land to the river Euphrates: for I will give the people of those lands into your power; and you will send them out before you.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain