Hebrews 6:4 describes those enlightened and tasted — the same group as here, making the falling away directly connected.

Hebrews 10:29 describes trampling the Son and profaning his blood — the same sin of contempt for Christ as 'crucifying him again' here.

Hebrews 12:2 shows Christ despising the shame of the cross — contrasting with apostates who hold him up to contempt.

Hebrews 10:39 contrasts the apostates of Hebrews 6:6 with those who have faith and do not shrink back, strengthening the warning.

Matthew 27:38-44 records the mockery of Christ on the cross — the same contempt that apostates repeat by crucifying him again.

Mark 15:29-32 shows the derision of Christ on the cross — the same contempt apostates renew in Hebrews 6:6.

In Luke 23:35-39, the actual mockery and crucifixion of Christ is shown — those who fall away reenact this by rejecting Him.

2 Timothy 2:25 offers hope that God may grant repentance — contrasting with Hebrews' statement that some cannot be renewed to repentance.

1 Peter 2:3 uses the same 'tasted that the Lord is good' phrase—echoing the earlier tasting in Hebrews and grounding the apostasy warning in genuine experience.

Titus 3:5 describes regeneration and renewal by the Holy Spirit—contrasting with the impossibility of renewing apostates to repentance in Hebrews.

Psalm 51:1 pleads for mercy and cleansing after sin — contrasting with the impossibility of repentance in Hebrews 6:6.

Isaiah 1:28 speaks of rebels who forsake the Lord being consumed — similar to apostates who fall away and face judgment.

Colossians 3:10 speaks of renewal in knowledge after the image of the Creator—contrasting with those who fall away from such renewal in Hebrews.