Matthew 27:15 - Now at that feast the governor was wont to release unto the people a prisoner, whom they would. (Verses like Matthew 27:15)
Mark 15:6 - Now at that feast he released unto them one prisoner, whomsoever they desired. (Verses like Mark 15:6)
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? (Verses like John 18:39)