1 Samuel 20:4-9

4Then said Jonathan to David, Whatever thy soul desireth, I will even do it for thee.12 5And David said to Jonathan, Behold, to morrow is the new moon, and I should not fail to sit with the king at the table: but let me go, that I may hide myself in the field to the third day at evening. 6If thy father shall at all miss me, then say, David earnestly asked leave of me that he might run to Bethlehem his city: for there is a yearly sacrifice there for all the family.3 7If he shall say thus, It is well; thy servant shall have peace: but if he shall be very angry, then be sure that evil is determined by him. 8Therefore thou shalt deal kindly with thy servant; for thou hast brought thy servant into a covenant of the LORD with thee: however, if there is in me iniquity, slay me thyself; for why shouldest thou bring me to thy father?

9And Jonathan said, Far be it from thee: for if I knew certainly that evil is determined by my father to come upon thee, then would not I tell it thee?