Many times people get the impression that someone just walked around behind Solomon, wrote down all of the smart stuff he said, and that’s how we got Proverbs. It was a little more complicated that that.
While many of these can be credited to Solomon, not all of them are his. And, beginning with chapter 25, we find that the last few chapters were added to the book much later, when Hezekiah was king (at least 200 years after Solomon’s death).
Remove the dross from the silver,and material for the silversmith will emerge; remove the wicked from before the king, and his throne will be established in righteousness. (25:4-5)
Just like “it takes two to tango”, it takes two sides to produce a good nation. Solomon has spent much time discussing the need for a ruler (or government) with integrity. Here he gives the second part – a people of integrity.
Just like a good people will suffer under a godless government, a good ruler will not be able to accomplish good things with a godless people. Here Solomon reminds the people that the nation will do well if those who choose wickedness are removed from society.
If your enemy is hungry, give him food to eat,and if he is thirsty, give him water to drink, for you will heap coals of fire on his head, and the Lord will reward you. (25:21-22)