A.T. Robertson Commentary Luke 19:22

"He saith unto him, Out of thine own mouth will I judge thee, thou wicked servant. Thou knewest that I am an austere man, taking up that which I laid not down, and reaping that which I did not sow;" — Luke 19:22 (ASV)

Thou knewest (ηιδεις). Second past perfect of οραω, to see, used as imperfect of οιδα, to know. Either it must be taken as a question as Westcott and Hort do or be understood as sarcasm as the Revised Version has it. The words of the wicked (πονηρος) slave are turned to his own condemnation.