Fathwa, - Niqab as Sunnah doesn’t make sense to me…

Question:
Is it proper to refer to actions of the wives of the Holy Prophet
(sallalaho alaihe wassalam) as "Sunnah" actions? I ask because some
sisters refer to wearing niqab as Sunnah but that doesn�t make sense
to me. I understand if they said it is a sunnah of the wives of the
prophet, but Sunnah (with a capital) doesn�t make sense to me!
Answer:
Assalamu alaykum
In the name of Allah the Inspirer of truth
Sunna is a way that is followed in the din. It includes the way
followed by the Messenger of Allah (upon him be peace), whether it was
something he did himself or told others to do or approved of in others
(as in the case in question).
As for the niqab, it is more than just a "Sunna" in your understanding
of the word. It has been considered wajib by many scholars.