'One's' in the Bible

John the Baptist appeared in the wilderness preaching a baptism of repentance for the forgiveness of sins [that is, requiring a change of one’s old way of thinking, turning away from sin and seeking God and His righteousness].

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

In the resurrection, when they rise again, which one’s wife will she be? For all seven had married her.”

and to love Him out of all the heart, and out of all the understanding, and out of all the soul, and out of all the strength, and to love one's neighbour as one's self, is more than all the whole burnt-offerings and the sacrifices.'