The men of Judah came and there they anointed David as king over the people of Judah. David was told, "The people of Jabesh Gilead are the ones who buried Saul."

So David sent messengers to the people of Jabesh Gilead and told them, "May you be blessed by the Lord because you have shown this kindness to your lord Saul by burying him.

he went and took the bones of Saul and of his son Jonathan from the leaders of Jabesh Gilead. (They had secretly taken them from the plaza at Beth Shan. It was there that Philistines publicly exposed their corpses after they had killed Saul at Gilboa.)