Sixth Woe - against corrupt judges, who, “mighty” in drinking “wine” (a boast still not uncommon), if not in defending their country, obtain the means of self-indulgence by taking bribes (“reward”). The two verses are closely joined [Maurer].
mingle strong drink - not with water, but spices to make it intoxicating (Pro 9:2, Pro 9:5; Son 8:2).
take away the righteousness - set aside the just claims of those having a righteous cause.