Judges 3:4
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.
Cross-references
Judges 3:1
Parallel
Judges 3:1 introduces the same purpose — God left nations to test Israel — directly paralleling this verse.
Judges 2:22
Parallel
Judges 2:22 gives the same testing rationale for leaving nations — directly parallels the testing theme here.
1 Corinthians 11:19
Related theme
1 Corinthians 11:19 says divisions test and reveal genuine believers — a NT parallel to God's testing through nations here.