1 Samuel 20:4-9

4And Jonathan said to David, What thy soul may say, I will even do it for thee.

5And David said to Jonathan, Behold, to-morrow is new moon, and I should not fail to sit with the king at meat; but let me go, that I may hide myself in the field until the third evening.

6If thy father should actually 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.

7If he say thus, It is well, — thy servant shall have peace; but if he be very wroth, be sure that evil is determined by him.

8Deal kindly then with thy servant; for thou hast brought thy servant into a covenant of Jehovah with thee; but if there be 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 with certainty that evil were determined by my father to come upon thee, would I not tell it thee?