'Sworn' in the Bible

So now, promise me this with an oath sworn in the Lord's name. Because I have shown allegiance to you, show allegiance to my family. Give me a solemn pledge

Indeed, for forty years the Israelites traveled through the desert until all the men old enough to fight when they left Egypt, the ones who had disobeyed the Lord, died off. For the Lord had sworn a solemn oath to them that he would not let them see the land he had sworn on oath to give them, a land rich in milk and honey.

The Israelites did not attack them because the leaders of the community had sworn an oath to them in the name of the Lord God of Israel. The whole community criticized the leaders,