Al-Kāfi
Hadith 13396ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ مُعَاوِيَةَ قَالَ قُلْتُ لأَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) الْمُحْرِمُ يَسْتَاكُ قَالَ نَعَمْ قُلْتُ فَإِنْ أَدْمَى يَسْتَاكُ قَالَ نَعَمْ هُوَ مِنَ السُّنَّةِ وَرُوِيَ أَيْضاً لا يَسْتَدْمِي.
6. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Mu‘awiyah who has said the following: “I once asked abu ‘Abd Allah (a.s.), about a man who is in the state of Ihram; if he can brush his teeth. He (the Imam) said, ‘Yes, it is of the Sunnah.’ It is also narrated that one must not make his teeth bleed.”