The world's best woman

Once The Holy Prophet Muhammad (PBUH)  discussed with his fellows, who,s best women from world women’s. Every body say something about it but talk not end on any decision. Ali RA went home for some reason and tell Fatima RA about it. she RA replied that The best woman in the world who do not see any non mahram and any non mahram see her. Hazrat Ali RA came back from home
And said the Holy Prophet (PBUH)
O Messenger of Allah (PBUH) My wife told me The best woman in the world who do not see any non mahram and any non mahram see her

The Prophet said, Fatima is a part of my body