Al-Kāfi - Volume 4 > Taqsir (Trimming something from One’s Hair or Nails After Completing Sa‘y) of One Who Is for al-Hajj al-Tamattu‘ (advantageous) and Coming Out of the State of Ihram
Hadith #2

2ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيلَ قَالَ رَأَيْتُ أَبَا الْحَسَنِ (عَلَيْهِ السَّلاَم) أَحَلَّ مِنْ عُمْرَتِهِ وَأَخَذَ مِنْ أَطْرَافِ شَعْرِهِ كُلِّهِ عَلَى الْمُشْطِ ثُمَّ أَشَارَ إِلَى شَارِبِهِ فَأَخَذَ مِنْهُ الْحَجَّامُ ثُمَّ أَشَارَ إِلَى أَطْرَافِ لِحْيَتِهِ فَأَخَذَ مِنْهُ ثُمَّ قَامَ.

2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn ‘Isma‘il who has said the following: “I saw abu al-Hassan, ‘Alayhi al-Salam, come out of the state of Ihram of al-‘Umrah. He (the Imam) had taken from the side of his hairs all around by the help of a comb. He (the Imam) then pointed to his mustache and the barber took a certain amount from them. He (the Imam) then pointed to his beard and the barber took a certain amount from it. He (the Imam) then stood up.”