'One's' in the Bible

Teacher, Moses wrote to us that if any one's brother die, and leave a wife behind, and leave no children, that his brother shall take his wife, and raise up seed to his brother.

and to love him with all the heart, and with all the intelligence, and with all the soul, and with all the strength, and to love one's neighbour as one's self, is more than all the burnt-offerings and sacrifices.