“And upon a set day Herod, arrayed in royal apparel, sat upon his throne, and made an oration unto them.”
King James Version (KJV)
12:21 And on a set day - Which was solemnized yearly, in honour of Claudius Cesar; Herod, arrayed in royal apparel - In a garment so wrought with silver, that the rays of the rising sun striking upon, and being reflected from it, dazzled the eyes of the beholders. The people shouted, It is the voice of a god - Such profane flattery they frequently paid to princes. But the commonness of a wicked custom rather increases than lessens the guilt of it.
Ac 12:21 Upon a set day Herod. Josephus (Antiq. 19:8,2) confirms Luke's account. He states why Herod was at Caesarea, speaks of the assembly, the royal robe, the oration, the impious shout of the people, the sudden death of Herod, and pronounces it a judgment.