NET
28 Then Moses said, “This is how you will know that the Lord has sent me to do all these works, for I have not done them of my own will.
Darby
28 And Moses said, Hereby ye shall know that Jehovah has sent me to do all these deeds, for they are not out of my own heart:
KJV
28 And Moses said, Hereby ye shall know that the LORD hath sent me to do all these works; for [I have] not [done them] of mine own mind.