Mishkat al-Masabih

He reported the Prophet (ﷺ) as saying, “A woman should be concealed, for when she goes out the devil looks at her.”* * The basic idea is to lift up the eyes to look at something. Here it is explained as meaning either that the devil makes her attractive to men, or that he looks at her to seduce her and to seduce people by her. Tirmidhi transmitted it.

وَعَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «الْمَرْأَةُ عَوْرَةٌ فَإِذَا خَرَجَتِ اسْتَشْرَفَهَا الشَّيْطَانُ» . رَوَاهُ التِّرْمِذِيّ