2 Chronicles 20:23

And the children of Ammon and Moab made an attack on the people of Mount Seir with a view to their complete destruction; and when they had put an end to the people of Seir, everyman's hand was turned against his neighbour for his destruction.

Judges 7:22

And the three hundred gave a loud note on their horns, and every man's sword was turned by the Lord against his brother all through the army; and the army went in flight as far as Beth-shittah in the direction of Zeredah, to the edge of Abel-meholah by Tabbath.

1 Samuel 14:20

And Saul and all the people with him came together and went forward to the fight: and every man's sword was turned against the man at his side, and there was a very great noise.

Genesis 14:6

And the Horites in their mountain Seir, driving them as far as El-paran, which is near the waste land.

Genesis 36:8-9

So Esau made his living-place in the hill-country of Seir (Esau is Edom).

Deuteronomy 2:5

Make no attack on them, for I will not give you any of their land, not even space enough for a man's foot: because I have given Mount Seir to Esau for his heritage.

Joshua 24:4

And to Isaac I gave Jacob and Esau: to Esau I gave Mount Seir, as his heritage; but Jacob and his children went down to Egypt.

Ezekiel 35:2-3

Son of man, let your face be turned to Mount Seir, and be a prophet 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 mountain Seir, driving them as far as El-paran, which is near the waste land.
Genesis 36:8
So Esau made his living-place in the hill-country of Seir (Esau is Edom).
Deuteronomy 2:5
Make no attack on them, for I will not give you any of their land, not even space enough for a man's foot: because I have given Mount Seir to Esau for his heritage.
Joshua 24:4
And to Isaac I gave Jacob and Esau: to Esau I gave Mount Seir, as his heritage; but Jacob and his children went down to Egypt.
Ezekiel 35:2
Son of man, let your face be turned to Mount Seir, and be a prophet against it,

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