It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Charity is not lawful for a wealthy person, except for the wealthy person who is in the path of Allah."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الصدقات / 13200