Charles H. Spurgeon on Psalms 54:1

Judge me by thy strength, or power, i.e., determine, decide my cause by thy mighty power. Saul, in the cause between him and David, was resolved to end it by force only, and to arbitrate in no other way than by a javelin, a sword, or his forces. The psalmist well knew that Saul, in this respect, would be too hard for him; and therefore applies for protection and justice to one whose power he knew was infinitely superior to his adversaries, and who, he was assured, could and would defend him. Samuel Chandler (1693-1766), in "A Critical History of the Life of David."