Charles H. Spurgeon on Psalms 109:6

Let Satan stand at his right hand. Hugo observes that the Devil is on the left hand of those whom he persecutes in temporal things: on the right of those whom he rules in spiritual things: before the face of those who are on their guard against his wiles: behind those who are not foreseeing and prudent: above those whom he treads down: below, and beneath the feet of those who tread him down. A recent Spanish author, (Peter Vega. On the Penitential Psalms.) writing in that language, thinks that there cannot be anything worse than that man who diligently and of set purpose injures others by speaking deceitfully, by surrounding with speeches of hatred, by attacking without cause, by slandering, by returning evil for good, and hatred for love: therefore, in this place it is desired that a wicked man may be set over such a one, and the devil at his right hand; as if he should be doomed to take the lowest place because he is the worst. —Lorinus.