Read Mark chapter 15:7-15
7 Now a man called Barabbas was then in prison with the rebels who had committed murder during the uprising.

8 When the crowd went up and began to ask Pilate the customary favour,

9 Pilate answered them, 'Do you want me to release for you the king of the Jews?'

10 For he realised it was out of jealousy that the chief priests had handed Jesus over.

11 The chief priests, however, had incited the crowd to demand that he should release Barabbas for them instead.

12 Then Pilate spoke again, 'But in that case, what am I to do with the man you call king of the Jews?'

13 They shouted back, 'Crucify him!'

14 Pilate asked them, 'What harm has he done?' But they shouted all the louder, 'Crucify him!'