John Lightfoot on Mark 15:6

[At that feast he released, &c.] The Syriac reads,...; and so the Arab, every feast: Beza, at each of the feasts, which pleases me not at all. For it is plainly said by Pilate himself, "that I should release unto you one at the Passover," John 18:39: and the releasing of a prisoner suits not so well to the other feasts as to the Passover; because the Passover carries with it the memory of the release of the people out of Egypt: but other feasts had other respects...according to the nature and quality of the feast, which was a monument of release...