22. Ali ibn Muhammad has narrated from Sahl ibn Ziyad from Muhammad ibn Sulayman from Ali ibn Ibrahim from ‘Abdallah ibn Sinan that Abu ‘Abdillah (al-Sadiq) (as) said
“The hujjah (proof) of Allah over the worshippers is the Prophet (sw) and the hujjah (proof) between Allah and the people is the intellect (al-'Aql).”