Joshua 9-12 (The Daily Walk Bible).

If someone intentionally lied to you, and you had made a promise because of it, would you honor that promise? Probably not. But here we find the leadership of Israel saying, “We have sworn an oath in the presence of the Lord, the God of Israel” (9:19). Because of that oath, Israel spared the Gibeonites lives, but there were some consequences because of their actions (9:21). It reminds me of what Jesus said: “Let what you say be simply ‘Yes’ or ‘No’; anything more than this comes from evil.”