When someone looks without permission, his eye

Al-Adab Al-Mufrad · Book 43 · Hadith 1068

حَدَّثَنَا أَبُو الْيَمَانِ، قَالَ‏:‏ أَخْبَرَنَا شُعَيْبٌ، قَالَ‏:‏ حَدَّثَنَا أَبُو الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ‏:‏ لَوْ اطَّلَعَ رَجُلٌ فِي بَيْتِكَ، فَخَذَفْتَهُ بِحَصَاةٍ فَفَقَأْتَ عَيْنَهُ، مَا كَانَ عَلَيْكَ جُنَاحٌ‏.‏

Abu Hurayra reported that the Prophet, may Allah bless him and grant him peace, said, "If a man looks into your house and you take some pebbles and gouge out his eye, there is no fault in you."

Al-Adab Al-Mufrad · Book 43 · Hadith 1069

حَدَّثَنَا حَجَّاجٌ، قَالَ‏:‏ حَدَّثَنَا حَمَّادٌ، قَالَ‏:‏ حَدَّثَنَا إِسْحَاقُ بْنُ عَبْدِ اللهِ، عَنْ أَنَسٍ قَالَ‏:‏ كَانَ النَّبِيُّ صلى الله عليه وسلم قَائِمًا يُصَلِّي، فَاطَّلَعَ رَجُلٌ فِي بَيْتِهِ، فَأَخَذَ سَهْمًا مِنْ كِنَانَتِهِ، فَسَدَّدَ نَحْوَ عَيْنَيْهِ‏.‏

Anas said, "The Prophet, may Allah bless him and grant him peace, was standing in prayer and a man looked into his room. He took an arrow from his quiver and aimed it at his eyes."