SEV Biblia, Chapter 3:4
Estos, pues, fueron dejados para probar por ellos a Israel, para saber si escucharían los mandamientos del SEÑOR, que él había mandado a sus padres por mano de Moisés.
Clarke's Bible Commentary - Judges 3:4
Verse 4. To know whether they would hearken] This would be the consequence of the Canaanites being left among them: if they should be faithful to God, their enemies would not be able to enslave them; should they be rebellious, the Lord would abandon them to their foes.
John Gill's Bible Commentary
Ver. 4. And they were to prove Israel by them , etc.] They were left in the land, as to inure them to war, and try their courage, so to prove their faithfulness to God: to know whether they would hearken to the commandments, of the Lord , which he commanded their fathers by the hand of Moses ; even all the commandments of the Lord delivered to them by Moses, moral, civil, and ceremonial, and particularly those that concerned the destruction of the Canaanites, their altars, and their idols, ( Deuteronomy 7:1,5).
Matthew Henry Commentary
Verses 1-7 - As the Israelites were a type of the church on earth, they were not to be idle and slothful. The Lord was pleased to try them by the remain of the devoted nations they spared. Temptations and trials detect the wickedness of the hearts of sinners; and strengthen he graces of believers in their daily conflict with Satan, sin, and this evil world They must live in this world, but they are not of it, and are forbidde to conform to it. This marks the difference between the followers of Christ and mere professors. The friendship of the world is more fata than its enmity; the latter can only kill the body, but the forme murders many precious souls.
Original Hebrew
ויהיו 1961 לנסות 5254 בם את 853 ישׂראל 3478 לדעת 3045 הישׁמעו 8085 את 853 מצות 4687 יהוה 3068 אשׁר 834 צוה 6680 את 853 אבותם 1 ביד 3027 משׁה׃ 4872