as-Sayyid ar-Raḍī says: We have already stated in the earlier chapter what Amīr al-mu’minīn replied to this man, namely his saying (no. 31) “Faith stands on four supports.”
وقد ذكرنا ما أجابه به عليه السلام فيما تقدم من هذا الباب، وهو قوله: الاِيمان على أربع شعب.
Similar narrations
Nahj al-Balāgha #2035as-Sayyid ar-Raḍī says: “find” means a lonely mountain (rising in height above the range).