Sahl ibn Sa'd told him that a man looked from a room through the door of the Prophet, may Allah bless him and grant him peace, while the Prophet, may Allah bless him and grant him peace, had a comb with which he was scratching his hair. When the Prophet, may Allah bless him and grant him peace, saw him, he said, "If I had known that you were looking at me, I would have stabbed you in the eye with this!"  

أَخْبَرَهُ أَنَّ رَجُلاً اطَّلَعَ مِنْ جُحْرٍ فِي بَابِ النَّبِيِّ ﷺ وَمَعَ النَّبِيِّ ﷺ مِدْرًى يَحُكُّ بِهِ رَأْسَهُ فَلَمَّا رَآهُ النَّبِيُّ ﷺ قَالَ لَوْ أَعْلَمُ أَنَّكَ تَنْتَظِرُنِي لَطَعَنْتُ بِهِ فِي عَيْنِكَ  

The Prophet, may Allah bless him and grant him peace, said, "The ear is put in the place of the eye."  

وَقَالَ النَّبِيُّ ﷺ إِنَّمَا جُعِلَ الإِذْنُ مِنْ أَجْلِ الْبَصَرِ  

Anas said, "A man looked through a gap into the room of the Prophet, may Allah bless him and grant him peace, and the Messenger of Allah aimed an arrow-head at him, and the man withdrew his head."  

عَنْ أَنَسٍ قَالَ اطَّلَعَ رَجُلٌ مِنْ خَلَلٍ فِي حُجْرَةِ النَّبِيِّ ﷺ فَسَدَّدَ رَسُولُ اللهِ ﷺ بِمِشْقَصٍ فَأَخْرَجَ الرَّجُلُ رَأْسَهُ