What does Psalm 35:15 mean?
The former friends who turned against David (Psalm 35:11–14) are celebrating as David has trouble. "Stumbling" in this verse suggests calamity, as in Job 18:12 and Jeremiah 20:10. David also refers to a group of strangers, calling them "wretches," which may also be translated as "those crippled" or "ruffians." The main implication is that of coarse, immoral men. This mob is constantly harassing David, including insults intended to tear him apart (Psalm 35:16). Yet, David did not know why they were behaving in such an evil way. He had done nothing to hurt them. Indeed, he had prayed for them. When he was expelled from Saul's court and branded as a criminal (1 Samuel 19:1–2), these former allies were happy and gleefully persecuted him.Persecuted believers may identify with David. Although they share the gospel because God's love compels them to do so, they encounter hostility. The apostle Peter tells his readers not to be surprised at the fiery trial when it comes upon them. In that specific context, this might have included the threat of being burned at the stake. He tells them to rejoice if they are insulted for the name of Christ, they are blessed (1 Peter 4:12–14).
Psalm 35:11–18 is the second of three variations on the same themes, which make up Psalm 35. David describes the attacks he endured. His enemy lied and used unscrupulous witnesses to level false accusations. This betrayal is made worse because David had been kind and loving towards them when they were in need. When they were sick, he prayed for them, and mourned when they did not recover. Yet now they ridiculed him. David calls out for God's intervention.
This is one of the "imprecatory psalms," which call on God to immediately judge or destroy His enemies. David echoes the same ideas in three phases. Each segment includes a plea for rescue, a request for God to conquer David's foes, and a promise to praise the Lord. David makes a point of noting that his enemies have no good reason for their hatred, since he was kind to them. With faith, David looks ahead, trusting he will have the opportunity to worship the Lord for His rescue and vindication.