Luke 23:9

ἐν λόγοις ἱκανοῖς : suggesting the idea of a desultory conversation, in which the king introduced topic after topic in a random, incoherent manner, showing no serious interest in any of his questions. οὐδὲν ἀπεκρίνατο, answered nothing, which would greatly astonish and pique this kingling, accustomed to courtier-servility. The fact that Jesus said nothing, and that nothing of importance came out of the appearance before Herod, may explain its omission by the other evangelists.