2 Samuel 21:1-6

There was famine in the days of David for three consecutive years; and David sought the presence (face) of the LORD [asking the reason]. The LORD replied, “It is because of Saul and his bloody house, because he put the Gibeonites to death.” So the king called the Gibeonites and spoke to them (now the Gibeonites were not of the sons (descendants) of Israel but of the remnant (survivors) of the Amorites. The Israelites had sworn [an oath] to [spare] them, but Saul in his zeal for the sons of Israel and Judah had sought to strike down the Gibeonites). So David said to the Gibeonites, “What should I do for you? How can I make it good so that you will bless the LORD’S inheritance (Israel)?” The Gibeonites said to him, “We will not accept silver or gold belonging to Saul or his household (descendants); nor is it for us to put any man to death in Israel.” David said, “I will do for you whatever you say.” So they said to the king, “The man who consumed us and planned to exterminate us from remaining in any territory of Israel, let seven men [chosen] from his sons (descendants) be given to us and we will hang them before the LORD [that is, put them on display, impaled with broken legs and arms] in Gibeah of Saul, the chosen one of the LORD.” And the king said, “I will give them.”