What was the Prophet Muhammad (saw)'s order regarding the Sadaqa in the letter that Ibn Hanafiya was instructed to deliver to `Uthman?
  Muhammad bin Suqa:                      I heard Mundhir at-Tuzi reporting Ibn Hanafiya who said, "My father sent me saying, 'Take this letter to `Uthman for it contains the orders of the Prophet concerning the Sadaqa.' "