Judges 3:4

They were [allowed to remain] for the testing of Israel, to determine whether Israel would listen to and obey the commandments of the Lord, which He had commanded their fathers (ancestors) through Moses.

Judges 2:22

in order to test [the loyalty of] Israel by them, whether Israel will keep the way of the Lord to walk in it, as their fathers did, or not.”

Judges 3:1

Now these are the nations which the Lord left [in order] to test Israel by them (that is, all [the people of Israel] who had not [previously] experienced any of the wars in Canaan;

Exodus 15:25

Then he cried to the Lord [for help], and the Lord showed him a tree, [a branch of] which he threw into the waters, and the waters became sweet.

There the Lord made a statute and an ordinance for them, and there He tested them,

Deuteronomy 8:2

And you shall remember [always] all the ways which the Lord your God has led you these forty years in the wilderness, so that He might humble you and test you, to know what was in your heart (mind), whether you would keep His commandments or not.

Deuteronomy 33:8

Of Levi he said,

“Your Thummim and Your Urim belong to Your godly man [Aaron],
Whom You tested and proved at Massah,
With whom You contended at the waters of Meribah;

1 Corinthians 11:19

for [doubtless] there have to be factions among you, so that those who are of approved character may be clearly recognized among you.

2 Thessalonians 2:9-12

The coming of the [Antichrist, the lawless] one is through the activity of Satan, [attended] with great power [all kinds of counterfeit miracles] and [deceptive] signs and false wonders [all of them lies],

Treasury of Scripture Knowledge

Summary

And they were to prove Israel by them, to know whether they would hearken unto the commandments of the LORD, which he commanded their fathers by the hand of Moses.

General references

Bible References

To prove

Judges 3:1
Now these are the nations which the Lord left [in order] to test Israel by them (that is, all [the people of Israel] who had not [previously] experienced any of the wars in Canaan;
Judges 2:22
in order to test [the loyalty of] Israel by them, whether Israel will keep the way of the Lord to walk in it, as their fathers did, or not.”
Exodus 15:25
Then he cried to the Lord [for help], and the Lord showed him a tree, [a branch of] which he threw into the waters, and the waters became sweet.

There the Lord made a statute and an ordinance for them, and there He tested them,
Deuteronomy 33:8
Of Levi he said,

“Your Thummim and Your Urim belong to Your godly man [Aaron],
Whom You tested and proved at Massah,
With whom You contended at the waters of Meribah;
1 Corinthians 11:19
for [doubtless] there have to be factions among you, so that those who are of approved character may be clearly recognized among you.
2 Thessalonians 2:9
The coming of the [Antichrist, the lawless] one is through the activity of Satan, [attended] with great power [all kinds of counterfeit miracles] and [deceptive] signs and false wonders [all of them lies],

General references

Deuteronomy 6:19
by driving out all your enemies from before you, as the Lord has spoken.