Abu Sa'id al-Maqburi said: I came to Umar bin al-Khattab (may Allah be pleased with him) with two hundred dirhams and said: O Commander of the Believers! This is the zakah of my wealth. He said: O Kaysan! Have you been set free? I said: Yes. He said: Then take it yourself and distribute it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7376