عن عبد الله عن النبي صلى الله عليه وسلم قال: إن المرأة عورة فإذا خرجت استشرفها الشيطان وأقرب ما تكون من وجه ربها وهي في قعر بيتها (مسند البزار رقم 1820)

It is reported from Hazrat Abdullah bin Mas‘ood (radhiyallahu ‘anhu) that Rasulullah (sallallahu ‘alaihi wasallam) said that a woman should be concealed (from the eyes of strange men). When she exits from her home, Shaitaan stares at her. The time that she is closest to her Lord is when she is concealed within the recesses of her home.