1 Samuel 20:41-42

When the lad was gone, David rose from the south side and fell on his face to the ground, and bowed three times. And they kissed each other and wept together, but David wept the more. Jonathan said to David, “Go in safety, inasmuch as we have sworn to each other in the name of the LORD, saying, ‘The LORD will be between me and you, and between my descendants and your descendants forever.’ ” Then he rose and departed, while Jonathan went into the city.