Charles H. Spurgeon on Psalms 59:2

Deliver me from the workers of iniquity. Saul was treating him very unjustly, and besides that was pursuing a tyrannical and unrighteous course towards others, therefore David the more vehemently appeals against him. Evil men were in the ascendant at court, and were the ready tools of the tyrant, against these also he prays. Bad men in a bad cause may be pleaded against without question. When a habitation is beset by thieves, the good man of the house rings the alarm bell; and in these verses we may hear it ring out loudly, "deliver me, ""defend me, ""deliver me, ""save me." Saul had more cause to fear than David had, for the invincible weapon of prayer was being used against him, and heaven was being aroused to give him battle. And save me from bloody men. As David remembers how often Saul had sought to assassinate him, he knows what he has to expect from that quarter and from the king's creatures and minions who were watching for him. David represents his enemy in his true colours before God; the bloodthirstiness of the foe is a fit reason for the interposition of the righteous God, for the Lord abhors all those who delight in blood.