narrating from one of the companions of Imam al-Sadiq (AS) who said: 'I told Imam al-Sadiq (AS), 'based on Allah's saying: whatever you may spend ... , I donate but do not see any repayment.' He (AS) asked: 'Have you ever seen Allah not fulfil His promise?' I said, 'No.' He asked, 'Then why do you say this?' I said, 'I do not know.' He said, 'If any of you acquires legitimate wealth and spends it rightfully, then he will not spend a single dirham without Allah repaying it.'