Esther 1:13

the wise men, which knew the times The expression includes two classes of functionaries, (a) the astronomers and astrologers, who based their advice upon observation of the heavens, and (b) students of the laws and customs which had come into existence in the past, and so formed a guide for the direction of present conduct.

for so was the king's manner etc. This does not indicate a custom of Ahasuerus in particular, but is a general remark to the effect that the kings of Persia were in the habit of taking counsel in this way before coming to any important resolution, and nothing that in any way concerned the king's dignity could be considered insignificant. By conforming to this national use Ahasuerus shewed that even on such an occasion, and while moved by passionate indignation, he was able to put some restraint upon himself. Another example of this usage in the Persian monarchy is that given by Herodotus (iii. 31), where Cambyses asks the opinion of the learned men who were about him before taking his sister in marriage.