Al-Kāfi - Volume 4 > The Case of a Man Who Becomes a Muslim before Having Circumcision
Hadith #2

2ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنْ حَمَّادِ بْنِ عِيسَى عَنْ حَرِيزٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ لا بَأْسَ أَنْ تَطُوفَ الْمَرْأَةُ غَيْرَ الْمَخْفُوضَةِ فَأَمَّا الرَّجُلُ فَلا يَطُوفُ إِلاَّ وَهُوَ مُخْتَتِنٌ.

2. Ali ibn Ibrahim has narrated from his father from Hammad ibn ‘Isa from Hariz who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘It is not harmful if a woman who is not Makhfudah (circumcised) performs Tawaf, but a man must not perform Tawaf until he is circumcised.’”