It is narrated from Ata bin Abi Maymunah (may Allah have mercy on him) that Imran bin Husayn (may Allah be pleased with him) was sent to collect sadaqah. When he returned, the people said: Where is the wealth? He said: Was it for wealth that you sent me? We took it from those from whom we used to take it in the time of the Prophet (peace and blessings be upon him), and gave it to those to whom we used to give it in his (peace and blessings be upon him) time.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الصدقات / 13138