It's an interesting feature about the critical moments in the earthly ministry of Jesus Christ that His own comments about them are seldom found in conjunction with the events themselves, but rather you find them somewhere else in Scripture. Think of the incarnation or the birth, for example. You don't find our Lord's comments there in connection with the birth narratives, naturally, or for that matter even anywhere else in the gospels. You do find it later on in the New Testament in the book of Hebrews, in chapter 10, verses 5-7. That author writes, "Therefore, when Christ came into the world, he said: 'Sacrifice and offering you did not desire, but a body you prepared for me; with burnt offerings and sin offerings you were not pleased. Then I said, “Here I am—it is written about me in the scroll—I have come to do your will, O God.”’”
What can the righteous do? There is one more thing. David had looked around at the wicked. He has looked up to God. Now he looks ahead, concerned at this point not with the destiny of his enemies but with his own destiny and that of all who trust God. As the last verse says, “For the LORD is righteous, he loves justice; upright men will see his face” (v. 7).
What can the righteous do? Well, for one thing, they can go on being righteous. And they can stand against the evil of their society, as many in the situations I have described are attempting to do. The one thing they must not do is "flee to the mountains."