2 Samuel 21:6-9

21:6 let seven of his male descendants be turned over to us, and we will execute them before the Lord in Gibeah of Saul, who was the Lord’s chosen one.” The king replied, “I will turn them over.”

21:7 The king had mercy on Mephibosheth son of Jonathan, the son of Saul, in light of the Lord’s oath that had been taken between David and Jonathan son of Saul. 21:8 So the king took Armoni and Mephibosheth, the two sons of Aiah’s daughter Rizpah whom she had born to Saul, and the five sons of Saul’s daughter Merab whom she had born to Adriel the son of Barzillai the Meholathite. 21:9 He turned them over to the Gibeonites, and they executed them on a hill before the Lord. The seven of them died together; they were put to death during harvest time – during the first days of the beginning of the barley harvest.