NET
13 The king then inquired of the wise men who were discerners of the times—for it was the royal custom to confer with all those who were proficient in laws and legalities.
Darby
13 And the king said to the wise men who knew the times (for so was the king's business [conducted] before all that knew law and judgment;
KJV
13 Then the king said to the wise men, which knew the times, (for so [was] the king's manner toward all that knew law and judgment: