Jarir said I asked the Apostle of Allaah ﷺ about an accidental glance (on a woman). He ﷺ said “Turn your eyes away.” (Using translation from Abū Dāʾūd 2148)   

سَأَلْتُ النَّبِيَّ ﷺ عَنْ نَظْرَةِ الْفَجْأَةِ؟ فَقَالَ «اصْرِفْ بَصَرَكَ»