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

Therefore you shall deal kindly with your servant, for you have brought your servant into a covenant of the LORD with you. Nevertheless, if there is iniquity in me, kill me yourself, for why should you bring me to your father?”

may the LORD do so and much more to Jonathan. But if it pleases my father to do you evil, then I will report it to you and send you away, that you may go in safety. And the LORD be with you as He has been with my father. And you shall not only show me the kindness of the LORD while I still live, that I may not die; but you shall not cut off your kindness from my house forever, no, not when the LORD has cut off every one of the enemies of David from the face of the earth.” So Jonathan made a covenant with the house of David, saying, “Let the LORD require it at the hand of David’s enemies.” Now Jonathan again caused David to vow, because he loved him; for he loved him as he loved his own soul.

Then Saul’s anger was aroused against Jonathan, and he said to him, “You son of a perverse, rebellious woman! Do I not know that you have chosen the son of Jesse to your own shame and to the shame of your mother’s nakedness? For as long as the son of Jesse lives on the earth, you shall not be established, nor your kingdom. Now therefore, send and bring him to me, for he shall surely die.” And Jonathan answered Saul his father, and said to him, “Why should he be killed? What has he done?” Then Saul cast a spear at him to kill him, by which Jonathan knew that it was determined by his father to kill David. So Jonathan arose from the table in fierce anger, and ate no food the second day of the month, for he was grieved for David, because his father had treated him shamefully.

Then Jonathan said to David, “Go in peace, since we have both sworn in the name of the LORD, saying, ‘May the LORD be between you and me, and between your descendants and my descendants, forever.’ ” So he arose and departed, and Jonathan went into the city.