Luke 23:17
[For according to the festival he had to release someone to them.]
Matthew 27:15
                            At the festival
Mark 15:6
                            At
John 18:39
                            You
Treasury of Scripture Knowledge
Summary
                            (For of necessity he must release one unto them at the feast.)                        
                    General references
Bible References
General references
                                        Matthew 27:15                                        
                                                                                                                                At the festival the governor’s custom was to release to the crowd a prisoner they wanted.  
                                    
                                        Mark 15:6                                        
                                                                                                                                At the festival it was Pilate’s custom to release for the people a prisoner they requested.    
                                    
                                        John 18:39                                        
                                                            
                        You have a custom that I release one prisoner to you at the Passover. So, do you want me to release to you the King of the Jews?”