Judges 8:28

Midian was defeated by the Israelites and was no longer a threat. The land was at peace for forty years, until Gideon died.

Judges 5:31

May all your enemies die like that, Jehovah, may your friends shine like the rising sun! There was peace in the land for forty years.

Judges 3:11

There was peace in the land for forty years until Othniel died.

Judges 3:30

That day the Israelites defeated Moab. There was peace in the land for eighty years.

Psalm 83:9-12

Do to them as you did to Midian, as you did to Sisera, as to Jabin, at the river Kishon

Isaiah 9:4

As in the day of Midian's defeat, you have shattered the yoke of his burdens: the bar across their shoulders, the rod of their oppressor.

Isaiah 10:26

Jehovah of Hosts will stir up enemies against you as when he struck down Midian at the rock of Oreb. His wrath will come by way of the sea, as he did in Egypt.

Treasury of Scripture Knowledge

Summary

Thus was Midian subdued before the children of Israel, so that they lifted up their heads no more. And the country was in quietness forty years in the days of Gideon.

Forty years

Bible References

Was midian

Psalm 83:9
Do to them as you did to Midian, as you did to Sisera, as to Jabin, at the river Kishon
Isaiah 9:4
As in the day of Midian's defeat, you have shattered the yoke of his burdens: the bar across their shoulders, the rod of their oppressor.
Isaiah 10:26
Jehovah of Hosts will stir up enemies against you as when he struck down Midian at the rock of Oreb. His wrath will come by way of the sea, as he did in Egypt.

Forty years

Judges 3:11
There was peace in the land for forty years until Othniel died.
Judges 5:31
May all your enemies die like that, Jehovah, may your friends shine like the rising sun! There was peace in the land for forty years.