Mark 4:12 has Jesus citing the same Isaiah 6:9-10 quote, linking Israel's hardening to the purpose of parables.

2 Corinthians 4:4 describes Satan blinding unbelievers — a different source but same result of spiritual blindness.

Romans 11:8-10 combines Deuteronomy 29:4 and Psalm 69:22-23 to depict Israel's judicial hardening, echoing Acts 28:26.

John 12:38-40 quotes Isaiah 6:10 and 53:1, directly attributing Israel's unbelief to God's blinding.

Luke 24:45 shows Jesus opening minds to understand Scripture — the opposite of the closed minds in Acts 28:26.

Luke 8:10 parallels Mark, also quoting Isaiah 6:9 to explain why parables hide truth from outsiders.

Mark 8:18 echoes Isaiah 6:9-10 directly: 'Having eyes do you not see, ears do you not hear?' — identical theme.

In Mark 8:17, Jesus asks if disciples' hearts are hardened — the same spiritual dullness Paul quotes from Isaiah.

Deuteronomy 29:4 states God had not given Israel eyes/ears to understand — the OT root of the hardening theme Paul later uses.

Matthew 13:14 is the same quotation by Jesus — showing how the Isaiah prophecy is fulfilled in the rejection of both Jesus and Paul.

Matthew 13:14 records Jesus quoting the same Isaiah prophecy — confirming that this description of spiritual blindness recurs in the gospel.

Ezekiel 3:7 states plainly: 'the house of Israel will not listen to you because they will not listen to me' — same stubborn refusal.

Jeremiah 5:21 uses nearly identical language: 'eyes but do not see, ears but do not hear' — a classic OT indictment.

Isaiah 42:20 echoes the same indictment: seeing but not perceiving, hearing but not listening — a direct parallel to the condition Paul quotes.

Isaiah 29:10 describes God pouring out a spirit of deep sleep, closing prophets' eyes — a direct parallel to the hardening in Acts 28:26.

Isaiah 6:10 continues the same quote — the command to make the people's heart dull, which Paul applies to the Jewish rejection.

Isaiah 6:9 is the original prophecy quoted here — God’s commission for the prophet to preach a message that hardens hearts.

John 12:40 quotes the same Isaiah 6:10 verse about blinding eyes and hardening hearts — the very prophecy Paul cites.

2 Corinthians 3:14 describes the same veil over Israel's minds when reading Scripture — directly paralleling the dullness of heart here.

Ezekiel 12:2 uses similar language about seeing but not perceiving — a parallel prophetic indictment of Israel’s spiritual blindness.

Romans 9:18 states God hardens whom He wills — a theological summary of the hardening principle applied in Acts 28:26.