Psalms 7:15,16 - Joseph Benson’s Commentary on the Old and New Testaments

He made a pit, &c. This is a proverbial manner of speech often used in Scripture. It is taken from pits which are digged, and then covered with the leaves of trees, or some such unstable materials, either to make men fall into them, or else wild beasts, which are hunted into them. And is fallen into the ditch which he made He hath brought that evil upon himself which he intended against others. His mischief shall return upon his own head “All the world agrees to acknowledge the equity of that sentence which inflicts upon the guilty the punishment intended by them for the innocent. No one pities the fate of a man buried in that pit which he had dug to receive his neighbour; or of him who owes his death wound to the return of an arrow shot against heaven. Saul was overthrown by those Philistines whom he would have made the instruments of cutting off David. Haman was hanged on his own gallows. The Jews, who excited the Romans to crucify Christ, were themselves, by the Romans, crucified in crowds. Striking instances these of the vengeance to be one day executed on all tempters and persecutors of others; when men and angels shall lift up their voices and cry out together, ‘Righteous art thou, O Lord, and just are thy judgments.'“