1 Samuel 18:3
And Jonathan and David cut a covenant, because he loved him as his own soul.
1 Samuel 20:8-17
And you shall deal kindly with your servant, for you have brought your servant into a covenant of Jehovah with you. But if there is any iniquity in me, kill me yourself. For why should you bring me to your father?
1 Samuel 20:42
And Jonathan said to David, Go in peace because we have both sworn in the name of Jehovah, saying, The Lord shall be between me and you, and between my seed and your seed, forever. And he rose and went away. And Jonathan went into the city.
1 Samuel 23:18
And the two of them cut a covenant before Jehovah. And David stayed in the forest, and Jonathan went to his house.
2 Samuel 9:1-3
And David said, Is there still any that is left from the house of Saul, that I may show him kindness for Jonathan's sake?
2 Samuel 21:7
But the king spared Mephibosheth, the son of Jonathan the son of Saul, because of Jehovah's oath that was between them, between David and Jonathan the son of Saul.