What does 1 Samuel 24:6 mean?

He said to his men, The Lord forbid that I should do this to my master, the Lord's chosen king. I can't harm him, because he's the one God picked. 1 Samuel 24:6 - Modern Text Bible

(David tells his men he can't attack Saul, because Saul is still God's anointed king, and it's not his place to harm him.)