1 Samuel 18:3
Then Jonathan made a covenant with David, because he loved him as his own soul.
1 Samuel 20:8-17
Therefore deal kindly with your servant, for you have brought your servant into a covenant of the LORD with you. But if there is guilt in me, kill me yourself, for why should you bring me to your father?"
1 Samuel 20:42
Then Jonathan said to David, "Go in peace, because we have sworn both of us in the name of the LORD, saying, 'The LORD shall be between me and you, and between my offspring and your offspring, forever.'" And he rose and departed, and Jonathan went into the city.
1 Samuel 23:18
And the two of them made a covenant before the LORD. David remained at Horesh, and Jonathan went home.
2 Samuel 9:1-3
And David said, "Is there still anyone left of 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 Saul's son Jonathan, because of the oath of the LORD that was between them, between David and Jonathan the son of Saul.