Sahih Bukhari
Obligatory Charity Tax (Zakat)
Volume: 002 / Book Number: 024 / Hadith Number: 512
Narrated Abu Burda bin Abu Musa:
that his father said, "Whenever a beggar came to Allah's Apostle or he was asked for something, he used to say (to his companions), "Help and recommend him and you will receive the reward for it; and Allah will bring about what He will through His Prophet's tongue."