2 Chronicles 20:23

and the sons of Ammon stand up, and Moab, against the inhabitants of mount Seir, to devote and to destroy, and at their finishing with the inhabitants of Seir, they helped, a man against his neighbour, to destroy.

Judges 7:22

and the three hundred blow the trumpets, and Jehovah setteth the sword of each against his companion, even through all the camp; and the camp fleeth unto Beth-Shittah, at Zererath, unto the border of Abel-Meholah, by Tabbath.

1 Samuel 14:20

And Saul is called, and all the people who are with him, and they come in unto the battle, and, lo, the sword of each hath been against his neighbour -- a very great destruction.

Genesis 14:6

and the Horites in their mount Seir, unto El-Paran, which is by the wilderness;

Genesis 36:8-9

and Esau dwelleth in mount Seir: Esau is Edom.

Deuteronomy 2:5

ye do not strive with them, for I do not give to you of their land even the treading of the sole of a foot; for a possession to Esau I have given mount Seir.

Joshua 24:4

And I give to Isaac, Jacob and Esau; and I give to Esau mount Seir, to possess it; and Jacob and his sons have gone down to Egypt.

Ezekiel 35:2-3

'Son of man, set thy face 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 their mount Seir, unto El-Paran, which is by the wilderness;
Genesis 36:8
and Esau dwelleth in mount Seir: Esau is Edom.
Deuteronomy 2:5
ye do not strive with them, for I do not give to you of their land even the treading of the sole of a foot; for a possession to Esau I have given mount Seir.
Joshua 24:4
And I give to Isaac, Jacob and Esau; and I give to Esau mount Seir, to possess it; and Jacob and his sons have gone down to Egypt.
Ezekiel 35:2
'Son of man, set thy face against mount Seir, and prophesy against it,