'Oath' in the Bible

Moses took the bones of Joseph with him, because Joseph had made the Israelites swear a solemn oath, saying, “God will certainly come to your aid; then you must take my bones with you from this place.”

there must be an oath before the Lord between the two of them to determine whether or not he has taken his neighbor’s property. Its owner must accept the oath, and the other man does not have to make restitution.