Hadith record

2. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Ali ibn Yaqtin from Abu Al-Hasan Musa (a.s.) who has said the following: “Once I said to the Imam, ‘I am afraid of the prayer of Abu ‘Abdillah (a.s.) against Yaqtin and his offspring.’ The Imam said, ‘O Abu al-Hasan, it is not as you think. A believer in the loins of an unbeliever is like a small piece of stone in a brick. Rain can wash away the brick but it never harms the solid piece of stone.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.