This verse is added, either,
1. As a reason or confirmation of the assertion, Psalms 75:7, and to show that God in removing one king to make way for another did not proceed in a way of absolute sovereignty, which yet he might have done, but in a way of justice and equity. Or,
2. As another argument to enforce his advice given Psalms 75:4,5, which he had now pressed by one argument, Psalms 75:6,7. God is here compared to the master of a feast, who then used to distribute portions of meats or drinks to the several guests as he thought fit. A cup, in Scripture, is sometimes taken in a good sense, for God's blessings, as Psalms 16:5, Psalms 23:5; and sometimes, and more frequently, in a bad sense, for God's vengeance and judgments, as Psalms 11:6 Isaiah 51:22 Jeremiah 49:12 Matthew 20:23, &c.; and so it is here understood, as the following words show. The wine is red; such as the best wine of Judea was, Deuteronomy 32:14 Proverbs 23:31; and so strong, and heady, and intoxicating. Or, is troubled; as the word more properly signifies, and is rendered by divers; which may note its newness, when it is in fermentation, not yet cleared nor settled, and so more intoxicating. So he expresseth the power and fierceness of God's wrath and judgments. It is full of mixture: the wine is mingled, not with water, as was usual in those hot countries, Proverbs 9:5, but with spices, as Song of Solomon 8:2; or rather, strengthening and intoxicating ingredients, which drunkards used, Isaiah 5:22. He poureth out of the same, to wit, to the children of men; promiscuously to good and bad; whereby he removes the scandal which his enemies might take from those troubles which God saw fit to inflict upon David and his followers. The dregs thereof; the worst and most dreadful part of those tribulations. Of the earth; or, of the land, to wit, of Canaan, of which he spoke Psalms 75:3. Shall wring them out; which expression may imply, either that they shall be forced to squeeze out the worst for their own drinking, or that this dreadful draught was prepared for them and brought upon them by their own choice and wickedness.