John 18:39

But it is your custom that I release one prisoner ¹  for you at the Passover. ²  So do you want me to release for you the king of the Jews?”

Mt 27:15-18; Mr 15:6,8; Lu 23:17,20; Joh 18:33

¹ tn The word “prisoner” is not in the Greek text but is implied.

² sn Pilate then offered to release Jesus, reminding the Jewish authorities that they had a custom that he release one prisoner for them at the Passover. There is no extra-biblical evidence alluding to the practice. It is, however, mentioned in Matthew and Mark, described either as a practice of Pilate (Mark 15:6) or of the Roman governor (Matt 27:15). These references may explain the lack of extra-biblical attestation: The custom to which Pilate refers here (18:39) is not a permanent one acknowledged by all the Roman governors, but one peculiar to Pilate as a means of appeasement, meant to better relations with his subjects. Such a limited meaning is certainly possible and consistent with the statement here.