NET
29 My message is like a fire that purges dross. It is like a hammer that breaks a rock in pieces. I, the Lord, so affirm it!
Darby
29 Is not my word like a fire, saith Jehovah; and like a hammer [that] breaketh the rock in pieces?
KJV
29 [Is] not my word like as a fire? saith the LORD; and like a hammer [that] breaketh the rock in pieces?