'Oath' in the Bible

then there will be an oath to the Lord between the two of them, that he has not laid his hand on his neighbor's goods, and its owner will accept this, and he will not have to pay.

The Lord said to Moses, "Go up from here, you and the people whom you brought up out of the land of Egypt, to the land I promised on oath to Abraham, to Isaac, and to Jacob, saying, 'I will give it to your descendants.'