1 Samuel 20:41-42

And when the boy had gone away, David rose up from his place, which turned toward the south, and falling prone on the ground, he reverenced three times. And kissing one another, they wept together, but David more so. Then Jonathan said to David: "Go in peace. And let us both keep all that we have ever sworn in the name of the Lord, saying, 'May the Lord be between me and you, and between my offspring and your offspring, even forever.' "