Luke 23:12

‘And Herod and Pilate became friends with each other that very day, for before they were at enmity between themselves.'

The interesting consequence of all this was that the enmity which had existed between Pilate and Herod was now broken down. Herod probably saw Pilate's gesture as a recognition of his status (and we all like people who recognise out status) and Pilate was probably grateful that Herod had tried to help him out of a hole and had supported him against the accusers of Jesus.

But Luke's mention of this had a twofold reason. Firstly it indicated that while Jesus might not have been willing to perform wonders before Herod, He had achieved what was truly a wonder, the reconciliation of two such opposite characters as Pilate and Herod, and secondly it emphasised why Jesus was here among men. He was present as the Prince of Peace.