The matters that Allah, the Most Holy, the Most High, and His Messenger صلى الله عليه وعلى آله وسلم have sanctioned as obligatory of the beings with the Imams عليه السلام

2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn abu Nasr who has said that he asked abu al-Hassan al-Rida عليه السلام about the meaning of the words of Allah, the Most Holy, the Most High, in the following verse. “Believers, be pious before God and always be friends with the truthful ones.” (9:119) The Imams عليه السلام said, “The truthful ones are the Imams عليه السلام who, are truthful in their obedience (to Allah).”