Matthew Henry on 1 Samuel 23:7-13

Well might David complain of his enemies, that they rewarded him evil for good, and that for his love they were his adversaries. Christ was used thus basely. David applied to his great Protector for direction. No sooner was the ephod brought him than he made use of it. We have the Scriptures in our hands, let us take advice from them in doubtful cases. Say, Bring hither the Bible. David's address to God is very solemn, also very particular. God allows us to be so in our addresses to him; Lord, direct me in this matter, about which I am now at a loss. God knows not only what will be, but what would be, if it were not hindered; therefore he knows how to deliver the godly out of temptation, and how to render to every man according to his works.