John 9:18
But the Jews did not believe concerning him, that he had been blind, and received his sight, until they called the parents of him that had received his sight.
Cross-reference
John 12:37-40 describes how the Jews still did not believe despite many signs, fulfilling Isaiah's prophecy of hardened hearts — directly explains this unbelief.
Isaiah 53:1 asks who has believed the report — this prophecy of rejection is fulfilled in the Jews' unbelief here.
In Luke 16:31, Jesus says even a resurrection won't convince those who reject Moses — the Jews, despite the healing, still refuse to believe.
Isaiah 26:11 laments that people do not see God's hand when it is lifted up — similar to the Jews not recognizing the miracle as God's work.
In Acts 3:10, the healed lame man is recognized, causing amazement — contrasting with the Jews' disbelief despite recognizing the blind man.
Hebrews 3:15-19 warns against unbelief using Israel's wilderness rebellion — the Jews' unbelief here mirrors that hardening.