Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) narrates from the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) said: "When you have paid the zakah of your wealth, you have removed its evil from yourself."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7238