Al-Kāfi - The Book of Haj

Chapter: Shaving and Trimming One’s Nails or Hair َّدٍ عَنِ ابْنِ أَبِي نَصْرٍ قَالَ قُلْتُ لأَبِي الْحَسَنِ الرِّضَا (عَلَيْهِ السَّلاَ٠) إِنَّا حِينَ نَفَرْنَا ٠َّ حَلَقْتُ رَأْسِي طَلَبَ التَّلَذُّذِ فَدَخَلَنِي ٠ِنْ ذَلِكَ شَيْ‏ءٌ فَقَالَ كَانَ أَبُو الْحَسَنِ (صلَّى اللهُ عَلَيْهِ وَآلِه) إِذَا خَرَجَ ٠َكَّةَ فَأُتِيَ بِثِيَابِهِ حَلَقَ رَأْسَهُ قَالَ وَقَالَ فِي قَوْلِ الله عَزَّ وَجَلَّ ثُ٠َّ لْيَقْضُوا تَفَثَهُ٠ْ وَلْيُوفُوا نُذُورَهُ٠ْ قَالَ التَّفَثُ تَقْلِي٠ُ الأَظْفَارِ وَطَرْحُ الْوَسَخِ وَطَرْحُ الإِحْرَا٠12.

Ahmad ibn Muhammad has narrated from ibn abu Nasr who has said the following: “I once asked abu al-Hassan, al-Rida’ (a.s.), about our case of leaving Mina’ and staying several days, then shaving my head for pleasure that raised a question in my mind. He (the Imam) said that when abu al-Hassan ‘Alayhi al-Salam, left Makkah, his clothes were brought to him and he shaved his head and said that in the words of Allah, most Majestic, most Glorious, ‘...

then they must spruce up and fulfill their vows...’ (22:29) ‘Tafath’ means cutting the finger nails, removing dirt and (clothes of) Ihram.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (18/188))