Abu Nu’aym reported: Sufyan al-Thawri, may Allah have mercy on him, said, “A woman will pass by a man and he cannot restrain himself from looking at her lustfully although there is no benefit in it. What could be weaker than this?”
Source: Ḥilyat al-Awliyā’ 7/68
عن أبي نعيم قال سفيان الثوري رحمه الله الْمَرْأَةُ تَمُرُّ بِالرَّجُلِ فَلَا يَمْلِكُ نَفْسَهُ عَنِ النَّظَرِ إِلَيْهَا وَلَا هُوَ يَنْتَفِعُ بِهَا فَأَيُّ شَيْءٍ أَضْعَفُ مِنْ هَذَا
7/68 حلية الأولياء وطبقات الأصفياء