In John 6:30, the crowd demands a sign to believe — directly contrasting Jesus' claim that they have seen Him yet do not believe.

John 6:40 promises eternal life to those who see and believe — contrasting with the unbelief of those who have seen yet do not believe.

John 6:64 states plainly that some do not believe — echoing the same unbelief Jesus pointed out here.

John 12:37 summarizes that despite many signs, the people still did not believe — a parallel to the same situation in this verse.

John 15:24 says they have seen Jesus' works and hated Him — a similar theme of seeing yet rejecting.

Luke 16:31 teaches that even a resurrection sign will not convince those who reject Moses — paralleling the principle that seeing Jesus does not guarantee belief.

1 Peter 1:8 describes believers who love Jesus without seeing Him — directly contrasting those who saw Him and did not believe.