Al-Kāfi

Hadith 1117
4ـ أَحْمَدُ بْنُ مُحَمَّدٍ عَنِ الْحَسَنِ بْنِ عَلِيٍّ عَنْ بَعْضِ أَصْحَابِنَا عَنْ سَعِيدٍ الأَعْرَجِ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ لا يَأْخُذُ الرَّجُلُ إِذَا رَأَى هِلالَ ذِي الْقَعْدَةِ وَأَرَادَ الْخُرُوجَ مِنْ رَأْسِهِ وَلا مِنْ لِحْيَتِهِ.
4. Ahmad ibn Muhammad has narrated from al-Hassan ibn Ali from certain persons of our people from Sa‘id al-‘Araj who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘A man who wants to go for al-Hajj must not remove any hair from his head or beard in the month of Dhu al-Qa’dah.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī