15. For he saith to Moses-- (Ex 33:19).
      I will have mercy on whom I will have--"on whom I have"
      mercy, and I will have compassion on whom I will have--"on whom I have"
      compassion--"There can be no unrighteousness in God's choosing whom He will, for to Moses He expressly claims the right to do so." Yet it is worthy of notice that this is expressed in the positive rather than the negative form: not, "I will have mercy on none but whom I will"; but, "I will have mercy on whomsoever I will."

JFB.