1 Samuel 20:13-16

But if he is angry and wants you killed, may the LORD strike me and even kill me if I don’t warn you so you can escape and live. May the LORD be with you as he used to be with my father. And may you treat me with the faithful love of the LORD as long as I live. But if I die, treat my family with this faithful love, even when the LORD destroys all your enemies from the face of the earth.” So Jonathan made a solemn pact with David, saying, “May the LORD destroy all your enemies!”