Al-Kāfi - Volume 6 > Lowering for Girls
Hadith #4

عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ بَعْضِ أَصْحَابِهِ عَنْ عَبْدِ اللَّهِ بْنِ سِنَانٍ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ الْخِتَانُ فِي الرَّجُلِ سُنَّةٌ وَ مَكْرُمَةٌ فِي النِّسَاءِ .

4. A number of our people have narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from certain persons of his people from ‘Abd Allah ibn Sinan who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘Circumcision for man is of Sunnah and it is a noble trait for women.’”