Upon the head of his seed - Compare the margin reference. Nothing further is heard of Joab’s descendants in the history.
Related Commentaries of 1 Kings 2:33
1 Kings 2:33
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.