٨ـ وَفِي وَصِيَّةِ الْمُفَضَّلِ قَالَ سَمِعْتُ أَبَا عَبْدِ الله (عَلَيهِ السَّلام) يَقُولُ مَنْ شَكَّ أَوْ ظَنَّ وَأَقَامَ عَلَى أَحَدِهِمَا أَحْبَطَ الله عَمَلَهُ إِنَّ حُجَّةَ الله هِيَ الْحُجَّةُ الْوَاضِحَةُ.
8. It is in the advice to al-Mufaddal who has said the following: “I heard Abu ‘Abdillah  saying, ‘One who has doubt or Zann (better than doubt and less than certainty) and lives with one of them (such conditions), Allah turns his deeds fruitless. The authority and proof for (existence of) Allah is clear authority and proof.’” 