7310. 'And you shall say to him' means a command. This is clear from the meaning of 'saying' - when done by the law of God, represented by 'Moses', to those who are steeped in falsities, represented by 'Pharaoh' - as a command.

In Deuteronomy 18:1, 3, prophet signifies one who gives a sign, and dreamer of dreams one who performs a miracle. (Apocalypse Explained 706)