Sayyiduna Abu Musa (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) said: "Indeed, the trustworthy treasurer, who gives as much as he was commanded, with a clean heart, until he hands it over to the one he was commanded to give it to, is also one of those who give charity."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7847