NET
4 The people to whom I am sending you are obstinate and hard-hearted, and you must say to them, ‘This is what the Sovereign Lord says.’
Darby
4 and these children are impudent and hard-hearted: I am sending thee unto them; and thou shalt say unto them, Thus saith the Lord Jehovah.
KJV
4 For [they are] impudent children and stiffhearted. I do send thee unto them; and thou shalt say unto them, Thus saith the Lord GOD.