NET

33 May Joab and his descendants be perpetually guilty of their shed blood, but may the Lord give perpetual peace to David, his descendants, his family, and his dynasty.”

Darby

33 And their blood shall be requited upon the head of Joab, and upon the head of his seed for ever; but upon David, and upon his seed, and upon his house, and upon his throne, shall there be peace for ever from Jehovah.

KJV

33 Their blood shall therefore return upon the head of Joab, and upon the head of his seed for ever: but upon David, and upon his seed, and upon his house, and upon his throne, shall there be peace for ever from the LORD.