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Al-Adab al-Mufrad 1072
حَدَّثَنَا مُحَمَّدُ بْنُ سَلاَمٍ، قَالَ: أَخْبَرَنَا الْفَزَارِيُّ، عَنْ حُمَيْدٍ، عَنْ أَنَسٍ قَالَ: اطَّلَعَ رَجُلٌ مِنْ خَلَلٍ فِي حُجْرَةِ النَّبِيِّ صلى الله عليه وسلم، فَسَدَّدَ رَسُولُ اللهِ صلى الله عليه وسلم بِمِشْقَصٍ، فَأَخْرَجَ الرَّجُلُ رَأْسَهُ.
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."
Cited in Al-Adab al-Mufrad (No. 1072).