[Machine] I asked the Prophet ﷺ about the sudden gaze, and he commanded me to avert my eyes.  

سَأَلْتُ النَّبِيَّ ﷺ عَنْ نَظْرَةِ الْفَجْأَةِ فَأَمَرَنِي أَنْ أَصْرِفَ بَصَرِي  

The Prophet ﷺ said: to Ali: Do not give a second look, Ali, (because) while you are not to blame for the first, you have no right to the second. (Using translation from Abū Dāʾūd 2149)   

قَالَ رَسُولُ اللهِ ﷺ لِعَلِيٍّ ؓ يَا عَلِيُّ لَا تُتْبِعِ النَّظْرَةَ النَّظْرَةَ فَإِنَّ لَكَ الْأُولَى وَلَيْسَتْ لَكَ الْآخِرَةُ وَاللهُ تَعَالَى أَعْلَمُ