A fool's lips enter into contention; literally, come with quarrel (comp. Psalms 66:13); i.e. they lead him into strife and quarrels; miscent se rixis, Vulgate; "lead him into evils," Septuagint. The foolish man meddles with disputes in which he is not concerned, and by his silly interference not only exposes himself to reprisals, but also exacerbates the original difficulty.
His mouth calleth for strokes. His words provoke severe punishment, "stripes for his back," as it is said in Proverbs 19:29. Septuagint, "His mouth which is audacious calls for death."