Imam Sadiq (a.s) was questioned about God's statement: “We did indeed offer the Trust to the Heavens and the Earth and the Mountains, but being afraid, they all refused to undertake it. However man undertook it- he was indeed unjust and foolish.” [The Holy Quran: Ahzab 33:72]. He was asked: “What was offered to them? What did man undertake? What is it?” Imam Sadiq (a.s) replied: “Trust between the people was offered, and this was done during the creation of the creatures.”