Joshua 15:21

The cities of the tribe of the sons of Judah in the extreme south toward the border of Edom were Kabzeel and Eder and Jagur,

Genesis 35:21

Then Israel (Jacob) journeyed on and pitched his tent on the other side of the tower of Eder [the lookout point used by shepherds].

Nehemiah 11:25

As for the villages with their fields, some sons (descendants) of Judah lived in Kiriath-arba and its towns, Dibon and its towns, and Jekabzeel and its villages,

Treasury of Scripture Knowledge

Summary

And the uttermost cities of the tribe of the children of Judah toward the coast of Edom southward were Kabzeel, and Eder, and Jagur,

Bible References

Eder

Genesis 35:21
Then Israel (Jacob) journeyed on and pitched his tent on the other side of the tower of Eder [the lookout point used by shepherds].