2 Samuel 21:8-9

8So the king took Armoni and Mephibosheth, the two sons of Rizpah the daughter of Aiah, whom she bore to Saul, and the five sons of Michal the daughter of Saul, whom she brought up for Adriel the son of Barzillai the Meholathite;

9and he delivered them into the hands of the Gibeonites, and they hanged them on the hill before the Lord. So they fell, all seven together, and were put to death in the days of harvest, in the first days, in the beginning of barley harvest.