Bulugh al-Maram 1 The Book of Purification كتاب الطهارة 94

وَعَنْ عَبْدِ اَللَّهِ بْنِ أَبِي بَكْرٍ رَحِمَهُ اَللَّهُ; { أَنَّ فِي اَلْكِتَابِ اَلَّذِي كَتَبَهُ رَسُولُ اَللَّهِ – صلى الله عليه وسلم -لِعَمْرِو بْنِ حَزْمٍ: أَنْ لَا يَمَسَّ اَلْقُرْآنَ إِلَّا طَاهِرٌ } رَوَاهُ مَالِكٌ مُرْسَلاً, وَوَصَلَهُ النَّسَائِيُّ, وَابْنُ حِبَّانَ, وَهُوَ مَعْلُولٌ.

Narrated ‘Abdullah bin Abu Bakr (rad): The book written by Allah’s Messenger (صلى الله عليه وسلم) for ‘Amr bin Hazm also contained: “ None except a pure person should touch the Quran”. [Reported by Malik as a Mursal and by An-Nasa’i and Ibn Hibban as Mawsul. And it is graded as Ma’lul (defective)].