1 Samuel 20:6-10

If your father misses me at all, then say, ‘David earnestly requested leave of me to run to Bethlehem, his city, because it is the yearly sacrifice there for the whole family.’

If he says, ‘That is good,’ your servant will be safe; but if he is very angry, be aware that he has decided on evil.

So deal kindly with your servant, for you have brought your servant into a covenant of the Lord with you. But if I am guilty of wrongdoing, kill me yourself; for why then should you bring me to your father?”

Jonathan said, “Far be it from you! For if I in fact learn that my father has decided to inflict harm on you, would I not inform you?”

Then David said to Jonathan, “Who will inform me if your father answers you harshly?”