2 Samuel 1

David learns of Saul and Jonathan's deaths from an Amalekite warrior who claims to have killed the mortally wounded Saul on Mount Gilboa.[1][4] David mourns Saul and Jonathan with a lament, expressing respect for them despite Saul being his former enemy, and executes the Amalekite for killing YHWH's anointed.[4][5]

Interlinear Text

And it came on the day the third and behold a man came from the camp from Saul and his clothes were torn and soil on his head And it was when he came to David and he fell to the ground and prostrated himself
and he said to him David how did it go the matter tell please me and he said that have fled the people from the battle and also many have fallen of the people and died and also Saul and Jonathan his son have died
and I stood over him and killed him because I knew that not he would live after he had fallen and I took the crown that on his head and the bracelet that on his arm and have brought them to my lord here