1 Kings 22:47

At that time there was no king in Edom;

2 Samuel 8:14

And he put armed forces in Edom; all through Edom he had armed forces stationed, and all the Edomites became servants to David. And the Lord made David overcome wherever he went.

2 Kings 3:9

So the king of Israel went with the king of Judah and the king of Edom by a roundabout way for seven days: and there was no water for the army or for the beasts they had with them.

2 Kings 8:20

In his time, Edom made themselves free from the rule of Judah, and took a king for themselves.

Genesis 25:23

And the Lord said to her, Two nations are in your body, and two peoples will come to birth from you: the one will be stronger than the other, and the older will be the servant of the younger.

Genesis 27:40

By your sword will you get your living and you will be your brother's servant; but when your power is increased his yoke will be broken from off your neck.

Genesis 36:31-43

And these are the kings who were ruling in the land of Edom before there was any king over the children of Israel.

Treasury of Scripture Knowledge

Summary

There was then no king in Edom: a deputy was king.

Bible References

No king

Genesis 25:23
And the Lord said to her, Two nations are in your body, and two peoples will come to birth from you: the one will be stronger than the other, and the older will be the servant of the younger.
Genesis 27:40
By your sword will you get your living and you will be your brother's servant; but when your power is increased his yoke will be broken from off your neck.
Genesis 36:31
And these are the kings who were ruling in the land of Edom before there was any king over the children of Israel.
2 Samuel 8:14
And he put armed forces in Edom; all through Edom he had armed forces stationed, and all the Edomites became servants to David. And the Lord made David overcome wherever he went.
2 Kings 3:9
So the king of Israel went with the king of Judah and the king of Edom by a roundabout way for seven days: and there was no water for the army or for the beasts they had with them.
2 Kings 8:20
In his time, Edom made themselves free from the rule of Judah, and took a king for themselves.

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