1 Samuel 20:8, 13-17, 30-34, 42

As for you, show kindness to your servant, for you have brought him into a covenant with you before the LORD. If I am guilty, then kill me yourself! Why hand me over to your father?”

But if my father intends to harm you, may the LORD deal with Jonathan, be it ever so severely, if I do not let you know and send you away in peace. May the LORD be with you as he has been with my father. But show me unfailing kindness like the LORD’s kindness as long as I live, so that I may not be killed, and do not ever cut off your kindness from my family—not even when the LORD has cut off every one of David’s enemies from the face of the earth.” So Jonathan made a covenant with the house of David, saying, “May the LORD call David’s enemies to account.” And Jonathan had David reaffirm his oath out of love for him, because he loved him as he loved himself.

Saul’s anger flared up at Jonathan and he said to him, “You son of a perverse and rebellious woman! Don’t I know that you have sided with the son of Jesse to your own shame and to the shame of the mother who bore you? As long as the son of Jesse lives on this earth, neither you nor your kingdom will be established. Now send someone to bring him to me, for he must die!” “Why should he be put to death? What has he done?” Jonathan asked his father. But Saul hurled his spear at him to kill him. Then Jonathan knew that his father intended to kill David. Jonathan got up from the table in fierce anger; on that second day of the feast he did not eat, because he was grieved at his father’s shameful treatment of David.

Jonathan said to David, “Go in peace, for we have sworn friendship with each other in the name of the LORD, saying, ‘The LORD is witness between you and me, and between your descendants and my descendants forever.’ ” Then David left, and Jonathan went back to the town.