٤ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ أَحْمَدَ عَنْ أَحْمَدَ بْنِ الْحَسَنِ عَنْ عَمْرِو بْنِ سَعِيدٍ عَنْ مُصَدِّقِ بْنِ صَدَقَةَ عَنْ عَمَّارِ بْنِ مُوسَى عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) فِي الصَّائِمِ يَنْزِعُ ضِرْسَهُ قَالَ لا وَلا يُدْمِي فَاهُ وَلا يَسْتَاكُ بِعُودٍ رَطْبٍ. 
4. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ahmad ibn al-Hassan from ‘Amr ibn Sa‘id from Musaddiq ibn Sadaqah from ‘Ammar ibn Musa who has said the following: “I once asked abu ‘Abd Allah , about a man who extracts his tooth when fasting. He (the Imam) said, ‘No, and one must not make his teeth bleed or brush with a fresh twig.’” 