The righteous shall be glad in the LORD, and shall trust in him; and all the upright in heart shall glory. The righteous shall be glad - They shall see that God does not abandon his followers to the malice of bad men. The rod of the wicked may come into the herttage of the just; but there it shall not rest. Calmet thinks that this is a prediction of the destruction of the Chaldeans, in consequence of which the Jewish people became highly respected by all the surrounding nations. But it may be applied more generally to the enmity of the wicked against the righteous, and how God counterworks their devices, and vindicates and supports his own followers.
Commentary on the Bible, by Adam Clarke [1831].