The king answered and said, "I am certain that you are stalling for time because you know that the memory of it has slipped away from me
Other versions
King James Version
The king answered and said, I know of certainty that ye would gain the time, because ye see the thing is gone from me. English Standard Version
The king answered and said, "I know with certainty that you are trying to gain time, because you see that the word from me is firm--New International Version
Then the king answered, "I am certain that you are trying to gain time, because you realize that this is what I have firmly decided: