Sahl ibn Sa'd told him that a man looked from a room through the door of the Prophet ﷺ while the Prophet ﷺ had a comb with which he was scratching his hair. When the Prophet ﷺ 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 ﷺ 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 ﷺ 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