2Sam 21:8-9

8The king took the two sons of Rizpah daughter of Aiah, whom she bore to Saul, Armoni and Mephibosheth; and the five sons of Merab daughter of Saul, whom she bore to Adriel son of Barzillai the Meholathite;9he gave them into the hands of the Gibeonites, and they impaled them on the mountain before the Lord. The seven of them perished together. They were put to death in the first days of harvest, at the beginning of barley harvest.