Al-Kāfi
Hadith 33ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ مَحْبُوبٍ عَنْ صَالِحِ بْنِ سَهْلٍ قَالَ قُلْتُ لأبِي عَبْدِ الله (عَلَيهِ السَّلام) جُعِلْتُ فِدَاكَ مِنْ أَيِّ شَيْءٍ خَلَقَ الله عَزَّ وَجَلَّ طِينَةَ الْمُؤْمِنِ فَقَالَ مِنْ طِينَةِ الأنْبِيَاءِ فَلَمْ تَنْجَسْ أَبَداً.
3. Ali ibn Ibrahim has narrated from his father from ibn Mahbub from Salih ibn Sahl who has said that I asked abu Abu ‘Abdillah (a.s.) the following: “May Allah keep my soul of service to you, from what kind of material has Allah, the Majestic, the Glorious, created the clay of the believers? He then replied, ‘He has created them with the clay from which the prophets were made. Thus, they never become unclean.’”