Charles Ellicott Commentary 1 Samuel 20:1

"And David fled from Naioth in Ramah, and came and said before Jonathan, What have I done? what is mine iniquity? and what is my sin before thy father, that he seeketh my life?" — 1 Samuel 20:1 (ASV)

And David fled from Naioth in Ramah, and came and said before Jonathan. —The strange course of events in the prophetic schools at Ramah, while warning David that even the home of his old master, the great seer, was no permanent sanctuary where he could safely rest, still gave him time to flee, and to take counsel with his loved friend, the king's son. It was, no doubt, by Samuel’s advice that he once more went to the city of Saul, but his return was evidently secret.

Alone with his friend, he passionately asserts his entire innocence of the crimes he was accused of by the unhappy, jealous Saul. His words here are found in substance in several of his Psalms, where, in touching language, he maintains how bitterly the world had wronged and persecuted a righteous, innocent man.