1 Samuel 31:7

When the men of Israel who were on the other side of the valley, with those who were beyond the Jordan, saw that the men of Israel had fled and that Saul and his sons were dead, they abandoned the cities and fled; then the Philistines came and lived in them.

Leviticus 26:32

I will make the land desolate so that your enemies who settle in it will be appalled over it.

Leviticus 26:36

As for those of you who may be left, I will also bring weakness into their hearts in the lands of their enemies. And the sound of a driven leaf will chase them, and even when no one is pursuing they will flee as though from the sword, and they will fall.

Deuteronomy 28:33

A people whom you do not know shall eat up the produce of your ground and all your labors, and you will never be anything but oppressed and crushed continually.

Judges 6:2

The power of Midian prevailed against Israel. Because of Midian the sons of Israel made for themselves the dens which were in the mountains and the caves and the strongholds.

1 Samuel 13:6

When the men of Israel saw that they were in a strait (for the people were hard-pressed), then the people hid themselves in caves, in thickets, in cliffs, in cellars, and in pits.

Treasury of Scripture Knowledge

Summary

And when the men of Israel that were on the other side of the valley, and they that were on the other side Jordan, saw that the men of Israel fled, and that Saul and his sons were dead, they forsook the cities, and fled; and the Philistines came and dwelt in them.

General references

Bible References

They forsook the cities

1 Samuel 13:6
When the men of Israel saw that they were in a strait (for the people were hard-pressed), then the people hid themselves in caves, in thickets, in cliffs, in cellars, and in pits.
Leviticus 26:32
I will make the land desolate so that your enemies who settle in it will be appalled over it.
Deuteronomy 28:33
A people whom you do not know shall eat up the produce of your ground and all your labors, and you will never be anything but oppressed and crushed continually.
Judges 6:2
The power of Midian prevailed against Israel. Because of Midian the sons of Israel made for themselves the dens which were in the mountains and the caves and the strongholds.

General references

2 Samuel 4:3
and the Beerothites fled to Gittaim and have been aliens there until this day).