1 Samuel 31:7

And when the men of Israel who [were] on the other side of the valley and [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 towns and fled. Thus [the] Philistines came and lived in them.

Leviticus 26:32

And I myself will lay waste the land, and your enemies who are living in it shall be appalled over it.

Leviticus 26:36

As for the ones who remain among you, I will bring fearfulness in their hearts in the land of their enemies; and a sound of a windblown leaf shall pursue them, and they shall flee [like] flight {before} a sword, and they shall fall, but there shall not be a pursuer.

Deuteronomy 28:33

A people that you do not know shall consume the harvest of your land and all your labor, and you will be only oppressed and crushed {for the rest of your lives}.

Judges 6:2

The hand of the Midianites prevailed over Israel; because of the presence of the Midianites, the {Israelites} made for themselves hiding places that [were] in the mountains, caves, and strongholds.

1 Samuel 13:6

When the men of Israel saw that [it was] {too difficult} for them, because the army was hard pressed, the people hid themselves in the caves, in the thorn bushes, in the cliffs, in the vaults and in the wells.

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 [it was] {too difficult} for them, because the army was hard pressed, the people hid themselves in the caves, in the thorn bushes, in the cliffs, in the vaults and in the wells.
Leviticus 26:32
And I myself will lay waste the land, and your enemies who are living in it shall be appalled over it.
Deuteronomy 28:33
A people that you do not know shall consume the harvest of your land and all your labor, and you will be only oppressed and crushed {for the rest of your lives}.
Judges 6:2
The hand of the Midianites prevailed over Israel; because of the presence of the Midianites, the {Israelites} made for themselves hiding places that [were] in the mountains, caves, and strongholds.

General references

2 Samuel 4:3
The Beerothites fled to Gittaim, and they are resident aliens there until this day.