If I were to know that you had been peeping through the door, I would have thrust that into your eyes, and Messenger of Allah ﷺ said: Permission is needed as a protection against glance. (Using translation from Muslim 2156a)
أَنَّ سَهْلَ بْنَ سَعْدٍ صَاحِبَ رَسُولِ اللهِ ﷺ أَخْبَرَهُ أَنَّ رَجُلًا اطَّلَعَ مِنْ جُحْرٍ فِي بَابِ رَسُولِ اللهِ ﷺ وَمَعَ رَسُولِ اللهِ ﷺ مِدْرًى يَحُكُّ بِهِ رَأْسَهُ فَلَمَّا رَآهُ رَسُولُ اللهِ ﷺ قَالَ «لَوْ أَعْلَمُ أَنَّكَ تَنْتَظِرُنِي لَطَعَنْتُ بِهِ فِي عَيْنِكَ إِنَّمَا جُعِلَ الِاسْتِئْذَانُ مِنْ قِبَلِ الْبَصَرِ»