1 Samuel 20:42

20:42 Jonathan said to David, “Go in peace, for the two of us have sworn together in the name of the Lord saying, ‘The Lord will be between me and you and between my descendants and your descendants forever.’”

David Goes to Nob
(21:1)

Then David got up and left, while Jonathan went back to the city.

1 Samuel 23:23

23:23 Locate precisely all the places where he hides and return to me with dependable information. Then I will go with you. If he is in the land, I will find him among all the thousands of Judah.”