 ٢٠ـ إِسْحَاقُ قَالَ أَخْبَرَنِي مُحَمَّدُ بْنُ الرَّبِيعِ الشَّائِيُّ قَالَ نَاظَرْتُ رَجُلاً مِنَ الثَّنَوِيَّةِ بِالاهْوَازِ ثُمَّ قَدِمْتُ سُرَّ مَنْ رَأَى وَقَدْ عَلِقَ بِقَلْبِي شَيْ‏ءٌ مِنْ مَقَالَتِهِ فَإِنِّي لَجَالِسٌ عَلَى بَابِ أَحْمَدَ بْنِ الْخَضِيبِ إِذْ أَقْبَلَ أَبُو مُحَمَّدٍ (عَلَيْهِ السَّلام) مِنْ دَارِ الْعَامَّةِ يَؤُمُّ الْمَوْكِبَ فَنَظَرَ إِلَيَّ وَأَشَارَ بِسَبَّاحَتِهِ أَحَدٌ أَحَدٌ فَرْدٌ فَسَقَطْتُ مَغْشِيّاً عَلَيَّ.
 20. Ishaq has said that narrated to me Muhammad ibn al-Rabi‘ al-Sa’i has said the following. “I debated a man who believed in dualism in Ahwaz them went to Surra man Ra‘a. However, his words were stuck to my heart. I was sitting in front of the door of Ahmad al-Khadib that I saw abu Muhammad  coming from the house for public gathering. It was the house wherein on a certain day the Sultan would allow the common people to visit him. The Imam  looked at me and made a gesture with his forefinger say One, single and only One. I fainted and fell on my face.”