1 Samuel 20:12-13

12And Jonathan said to David, Jehovah, 1God of Israel, when I sound my father about this time to-morrow, [or] the next day, and behold, there be good toward David, and I then send not to thee, and apprise thee of it,

13Jehovah do so and much more to Jonathan. Should it please my father [to do] thee evil, then I will apprise thee of it, and send thee away, that thou mayest go in peace; and Jehovah be with thee, as he has been with my father.