8 harden not your hearts, as in the bitter provocation, in the day of temptation in the wilderness;
Hebrews 3:8 Cross References - Living_Oracles
Matthew 13:15
15 For this people's understanding is stupefied, their ears are deafened, and their eyes they have closed; lest seeing with their eyes, hearing with their ears, and apprehending with their understanding, they should reform, and I should reclaim them."
Acts 19:9
9 But as some were hardened, and would not believe, speaking reproachfully of this way before the multitude, he departed from them, and separated the disciples, disputing daily in the school of one Tyrannus.
Romans 2:5-6
1 Corinthians 10:9
9 Neither let us grievously tempt Christ, as some of them tempted, and perished by serpents.