Judges 8:28

So Midian was subdued before the children of Israel, and they lifted up their heads no more. And the land had rest forty years in the days of Gideon.

Judges 5:31

So let all thine enemies perish, O Jehovah: But let them that love him be as the sun when he goeth forth in his might. And the land had rest forty years.

Judges 3:11

And the land had rest forty years. And Othniel the son of Kenaz died.

Judges 3:30

So Moab was subdued that day under the hand of Israel. And the land had rest fourscore years.

Psalm 83:9-12

Do thou unto them as unto Midian, As to Sisera, as to Jabin, at the river Kishon;

Isaiah 9:4

For the yoke of his burden, and the staff of his shoulder, the rod of his oppressor, thou hast broken as in the day of Midian.

Isaiah 10:26

And Jehovah of hosts will stir up against him a scourge, as in the slaughter of Midian at the rock of Oreb: and his rod will be over the sea, and he will lift it up after the manner of 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 thou unto them as unto Midian, As to Sisera, as to Jabin, at the river Kishon;
Isaiah 9:4
For the yoke of his burden, and the staff of his shoulder, the rod of his oppressor, thou hast broken as in the day of Midian.
Isaiah 10:26
And Jehovah of hosts will stir up against him a scourge, as in the slaughter of Midian at the rock of Oreb: and his rod will be over the sea, and he will lift it up after the manner of Egypt.

Forty years

Judges 3:11
And the land had rest forty years. And Othniel the son of Kenaz died.
Judges 5:31
So let all thine enemies perish, O Jehovah: But let them that love him be as the sun when he goeth forth in his might. And the land had rest forty years.

American Standard Version Public Domain