وَ قَالَ ع الْأَغْلَفُ لَا يَؤُمُّ الْقَوْمَ وَ لَوْ كَانَ أَقْرَأَهُمْ لِلْقُرْآنِ لِأَنَّهُ ضَيَّعَ مِنَ السُّنَّةِ أَعْظَمَهَا وَ لَا تُقْبَلُ لَهُ شَهَادَةٌ وَ لَا يُصَلَّى عَلَيْهِ إِلَّا أَنْ يَكُونَ تَرَكَ ذَلِكَ خَوْفاً
English translationBab Ul Qaim Publications
Hadith.1106 - Imam (as) said: "An uncircumcised man (al-aghlaf) should not lead the people in prayer, even if he is the most proficient in reciting the Qur'an among them, because he has neglected one of the greatest aspects of the Sunnah. His testimony is not accepted, and prayers are not performed over him unless he left it (circumcision) out of fear for his life."
Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.