What does 1 Samuel 22:17 mean?

Then Saul ordered his guards, 'Kill the priests of the Lord, because they’re on David’s side. They knew he was running from me and didn’t tell me.' But the king’s men refused to attack the priests. 1 Samuel 22:17 - Modern Text Bible

(Saul’s own guards won’t carry out his order to kill the priests, showing they know it’s wrong.)