Hijab was that veil that was behind the door but wasn"t removed


It"s narrated that one day a blind man came to their home with the Prophet (pbuh) and Imam Ali (as)
When he entered home, Fatima (as) went behind a curtain and came out with a perfect hijab.
Prophet (pbuh) asked: "my dear daughter, he is blind and he can"t see you. Why did you wear hijab?"
She answered: "If he doesn"t see me, I can see him and he can smell my odor."
Prophet (pbuh) said: "I testify that you are part of my body."