Obligatory Charity Tax (Zakat)

Bukhari :: Book 2 :: Volume 24 :: Hadith 556

Narrated Sad (bin Abi Waqqas) :

Allah's Apostle distributed something (from the resources of Zakat) amongst a group of people while I was sitting amongst them, but he left a man whom I considered the best of the lot. So, I went up to Allah's Apostle and asked him secretly, "Why have you left that person? By Allah! I consider him a believer." The Prophet said, "Or merely a Muslim (Who surrender to Allah)." I remained quiet for a while but could not help repeating my question because of what I knew about him. I said, "O Allah's Apostle! Why have you left that person? By Allah! I consider him a believer. " The Prophet said, "Or merely a Muslim." I remained quiet for a while but could not help repeating my question because of what I knew about him. I said, "O Allah's Apostle! Why have you left that person? By Allah! I consider him a believer." The Prophet said, "Or merely a Muslim." Then Allah's Apostle (p.b.u.h) said, "I give to a person while another is dearer to me, for fear that he may be thrown in the Hell-fire on his face (by renegating from Islam)."