Bede

And Saul said to his armor-bearer: Draw your sword, etc. The armor-bearer of Saul signifies the doctors of the law; for just as the arms and arrows of the Philistines are the deceits of the wicked, so on the contrary, the arms of the Israelites ought to be mystically understood as the words of spiritual doctrine, by which the people of God had to fortify themselves against all dangers. …

Commentary on Samuel ↗