Hosea 4:17 says 'Ephraim is joined to idols; leave him alone' — a direct parallel to Paul's instruction to let the ignorant be ignorant.

Matthew 15:14 has Jesus command 'let them alone' of blind guides — identical to Paul's instruction about those who are ignorant.

1 Timothy 6:3-5 tells believers to withdraw from those teaching false doctrine — reinforcing Paul's call to ignore willful ignorance.

Revelation 22:11 says 'let the evildoer still do evil' — a parallel to letting the ignorant stay ignorant, though in an eschatological setting.

Matthew 7:6 warns not to give holy things to those who reject them — similar to Paul's directive to stop engaging those who refuse truth.

2 Timothy 4:3 describes people who reject sound teaching and seek teachers for itching ears — the reason Paul says to leave them.

2 Timothy 4:4 says they turn from truth to myths — further explaining why Paul instructs to let the ignorant remain ignorant.