Zakat (Kitab Al-Zakat)
Dawud :: Book 9 : Hadith 1587
Narrated Abdullah ibn Amr ibn al-'As:
The Prophet (peace_be_upon_him) said: There is to be no collecting of sadaqah (zakat) from a distance, nor must people who own property remove it far away, and their sadaqahs are to be received in their dwelling.