Albert Barnes Commentary Esther 1:13

"Then the king said to the wise men, who knew the times, (for so was the king`s manner toward all that knew law and judgment;" — Esther 1:13 (ASV)

Wise men ... - Not “astrologers,” who were unknown in Persia; but rather men of practical wisdom, who knew the facts and customs of former times.

For so was the king’s manner - Some render it: “for so was the king’s business laid before all that knew law ...”