3-130 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Sa’ed ibn Abdullah quoted Ahmad ibn Muhammad ibn Isa, on the authority of Al-Hassan ibn Mahboob, on the authority of Zayd al-Shoham that Abu Abdullah as-Sadiq (MGB) said,

“Nothing is a harder (divine) test for a believer than giving charity from what he has earned from God the Almighty, being just and frequently remembering God.” He (MGB) then said, “I do not mean that you should often recite praises of God, but remember God in what you do regarding what is allowed and what is forbidden.”