Acts 12:21

‘And on a set day Herod arrayed himself in royal apparel, and sat on the throne, and made an oration to them.'

The day came for the royal triumph. On the set day Herod clothed himself regally and sat on his throne and made a great speech to them. The purpose was to make an impression and bring glory on himself. The Messiah rejecter was now exalting himself.

Josephus, the Jewish historian, describes how, on the second day of the festival, Agrippa entered the theatre clad in a robe of silver cloth, with the sun glinting on the silver, producing such an effect that the people (who of course wanted to please him) cried out that this was a god come to them. Josephus then goes on to tell us that at once a sudden and terrible illness fell on him from which he never recovered, and he died of severe abdominal pains five days later.