I Samuel 20:5-10

And David said to Jonathan, “Indeed tomorrow is the New Moon, and I should not fail to sit with the king to eat. But let me go, that I may hide in the field until the third day at evening. If your father misses me at all, then say, ‘David earnestly asked permission of me that he might run over to Bethlehem, his city, for there is a yearly sacrifice there for all the family.’ If he says thus: ‘It is well,’ your servant will be safe. But if he is very angry, be sure that evil is determined by him. Therefore you shall deal kindly with your servant, for you have brought your servant into a covenant of the LORD with you. Nevertheless, if there is iniquity in me, kill me yourself, for why should you bring me to your father?” But Jonathan said, “Far be it from you! For if I knew certainly that evil was determined by my father to come upon you, then would I not tell you?” Then David said to Jonathan, “Who will tell me, or what if your father answers you roughly?”