319. hadíth
وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «مَشْطُ اَلرَّأْسِ يَذْهَبُ بِالْوَبَاءِ وَ مَشْطُ اَللِّحْيَةِ يَشُدُّ اَلْأَضْرَاسَ.
Imam Jafar ibn Muhammad Al-Sadiq (a.s) said: "Combing the hair removes ailments, and combing the beard strengthens the teeth."