In John 6:44, Jesus teaches that coming to him requires the Father's drawing — this connects to the inability to believe here, both stressing divine sovereignty.

In John 8:43, Jesus says they cannot understand because they cannot listen — matching the blinded eyes and hardened hearts described here.

In John 8:37, Jesus notes that despite being Abraham's seed, they reject His word — the same unbelief explained here by Isaiah's prophecy.

In Isaiah 6:9, God commands the prophet to make the people hear without understanding — this is the commission quoted in the following verse.

In Isaiah 6:10, the prophet is told to blind the people's eyes — this is the exact text John quotes to explain their unbelief.

In Matthew 13:14, Jesus explicitly applies the same Isaiah prophecy to the crowds, showing their unbelief fulfills Scripture.

In 2 Thessalonians 2:11, God sends strong delusion so they believe a lie — the same divine hardening that causes unbelief here.