NET
15 Then those men came by collusion to the king and said to him, “Recall, O king, that it is a law of the Medes and Persians that no edict or decree that the king issues can be changed.”
Darby
15 Then these men came in a body unto the king, and said unto the king, Know, O king, that the law of the Medes and Persians is, That no decree nor statute which the king establisheth may be changed.
KJV
15 Then these men assembled unto the king, and said unto the king, Know, O king, that the law of the Medes and Persians [is], That no decree nor statute which the king establisheth may be changed.