'Neighbour' in the Bible

that which a man sinneth against his neighbour, and he hath lifted up upon him an oath to cause him to swear, and the oath hath come in before Thine altar in this house,

And a certain man of the sons of the prophets said unto his neighbour by the word of Jehovah, 'Smite me, I pray thee;' and the man refuseth to smite him,