Daniel 2:15 he answered and said to Arioch the king's captain, Why is the decree so rigorous from the king? Then Arioch made the thing known to Daniel. (DBY)
Daniel 3:22 Forasmuch as the king's commandment was rigorous, and the furnace exceeding hot, the flame of the fire slew those men that had taken up Shadrach, Meshach, and Abed-nego. (DBY)