2 Chronicles 20:23

The Ammonite and Moabite troops attacked and completely destroyed those from Edom. Then they turned against each other and fought until the entire camp was wiped out!

Judges 7:22

The three hundred blew the trumpets. Jehovah set every man's sword against his companions. They turned on each other throughout all the army. The army fled to Beth-shittah in Zererath, and to the border of Abel-meholah, to Tabbath.

1 Samuel 14:20

Saul and all the people with him came together and went forward to the battle. Every man's sword was turned against the man at his side. There was a very great noise.

Genesis 14:6

and the Horites in the hill country of Seir as far as El-paran on the edge of the wilderness.

Genesis 36:8-9

So Esau dwelt in Mount Seir. Esau is Edom.

Deuteronomy 2:5

Do not start a fight with them, because I am not giving you any of their land, not so much as one foot. I gave Esau's descendants the region of Mount Seir as their property.

Joshua 24:4

and to Isaac I gave Jacob and Esau. I gave Esau the hill country of Edom as his possession, but your ancestor Jacob and his children went down to Egypt.

Ezekiel 35:2-3

Son of man, set your face (commit yourself) against Mount Seir, and prophesy against it.

Treasury of Scripture Knowledge

Summary

For the children of Ammon and Moab stood up against the inhabitants of mount Seir, utterly to slay and destroy them: and when they had made an end of the inhabitants of Seir, every one helped to destroy another.

Bible References

Mount seir

Genesis 14:6
and the Horites in the hill country of Seir as far as El-paran on the edge of the wilderness.
Genesis 36:8
So Esau dwelt in Mount Seir. Esau is Edom.
Deuteronomy 2:5
Do not start a fight with them, because I am not giving you any of their land, not so much as one foot. I gave Esau's descendants the region of Mount Seir as their property.
Joshua 24:4
and to Isaac I gave Jacob and Esau. I gave Esau the hill country of Edom as his possession, but your ancestor Jacob and his children went down to Egypt.
Ezekiel 35:2
Son of man, set your face (commit yourself) against Mount Seir, and prophesy against it.