2. My father, may Allah grant him mercy, said: We were told by Sa’d bin Abdullah, from Ahmad bin Muhammed, from Bikr bin Saleh al-Razi, from Abu’s-Silt al-Khurasani, that he said: I asked al-Rida, peace be upon him, about faith, so he said:

Faith is a contract in the heart, uttering by the tongue and act with the limbs; faith is by nothing except like this.