1 Samuel 18:3

Then Jonathan made a covenant with David because he loved him as himself.

1 Samuel 20:8-17

Therefore show kindness to your servant, because you have brought your servant into a covenant of the Lord with you. But if there is iniquity (guilt) in me, kill me yourself; for why should you bring me to your father [to be killed]?”

1 Samuel 20:42

Jonathan told David, “Go in safety, inasmuch as we have sworn to each other in the name of the Lord, saying, ‘The Lord shall be between me and you, and between my descendants and yours forever.’” Then he stood and left, while Jonathan went into the city.

1 Samuel 23:18

So the two of them made a covenant before the Lord; and David stayed [in the woods] at Horesh and Jonathan went to his house.

2 Samuel 9:1-3

And David said, “Is there still anyone left of the house (family) of Saul to whom I may show kindness for Jonathan’s sake?”

2 Samuel 21:7

But the king spared Mephibosheth the son of Jonathan, the son of Saul, because of the Lord’s oath that was between David and Saul’s son Jonathan.

Treasury of Scripture Knowledge

Summary

Then Jonathan and David made a covenant, because he loved him as his own soul.

Bible References

General references

Genesis 21:32
So they made a covenant at Beersheba; then Abimelech and Phicol, the commander of his army, got up and returned to the land of the Philistines.
1 Samuel 23:18
So the two of them made a covenant before the Lord; and David stayed [in the woods] at Horesh and Jonathan went to his house.
Proverbs 17:17

A friend loves at all times,
And a brother is born for adversity.