'Sworn' in the Bible

The Israelis traveled 40 years in the wilderness until the entire nation that is, the warriors who had departed from Egypt had perished because they hadn't listened to the voice of the LORD. The LORD had promised them that he would not let them see the land that he had sworn to give us, a land that flows with milk and honey.

Then all of the leaders spoke to the entire congregation, "We have sworn to them in the name of the LORD, the God of Israel, and we cannot touch them.