Al-Kāfi
Hadith 2110عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ الْحَكَمِ عَنْ سَعْدَانَ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ إِنِّي لَأَحْلِقُ كُلَّ جُمُعَةٍ فِيمَا بَيْنَ الطَّلْيَةِ إِلَى الطَّلْيَةِ .
7. A number of our people have narrated from Ahmad ibn Muhammad from Ali ibn al-Hakam from Sa’dan from abu Basir who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘I shave every Friday from this to that duration.’”