John 18:39
But ye have a custom, that I should release unto you one at the passover: will ye therefore that I release unto you the King of the Jews?
Cross-references
John 18:33 has Pilate ask Jesus about his kingship, setting up the later offer to release the 'King of the Jews'.
John 18:28 sets the scene by noting the Jewish leaders stayed outside, explaining why Pilate came out to propose the release.
John 19:10 shows Pilate later asserting his authority to release or crucify, contrasting with his earlier deference to custom.
Matthew 27:15-18 adds that Pilate knew Jesus was handed over out of envy, providing context to the Passover release custom.
Mark 15:6 describes the same custom of releasing a prisoner at the feast, corroborating Pilate's offer.
Mark 15:8 shows the crowd asking Pilate to follow the custom, which Pilate then proposes in John.
Luke 23:17 states the obligation to release a prisoner at the feast, explaining the custom Pilate refers to.
Luke 23:20 reveals Pilate's desire to release Jesus, which prompts his offer of the custom in John.
Mark 15:9 preserves the same offer from Pilate, confirming the Passover release custom.