A rod of pride: their proud and insolent speeches, as they are like a rod, offensive and injurious to others, so they make a rod for their own hacks, by provoking God and man against them; which sense seems most probable, both from the opposite clause, and by comparing this place with Proverbs 10:13, Proverbs 26:3. For this phrase, the rod of pride, it may be compared with other like phrases, as the foot of pride, Psalms 36:11, the scourge of the tongue, Job 5:21, and the rod of the mouth, Isaiah 11:4. Shall preserve them, from that rod.
Related Commentaries of Proverbs 14:3
Proverbs 14:3
3 In the mouth of the foolish is a rod of pride: but the lips of the wise shall preserve them.