‘Amr b. Shu'aib on his father’s authority said that his grandfather told of the Prophet addressing the people and saying,
“If anyone is guardian of an orphan who owns property, he must trade with it and not leave it till the sadaqa consumes it."
Tirmidhi transmitted it, adding that its isnad has been criticised because al-Muthanna b. as- Sabbah was weak.
‘Amr b. Shu'aib on his father’s authority said his grandfather reported the Prophet as saying,
“There is to be no collecting of sadaqa from a distance, nor must people who own property remove it far away,* for their sadaqat are to be received only in their dwellings.”
Abu Dawud transmitted it.
* The point is that the collector of zakat must not make people bring their animals a long distance to him, and they must not remove their animals to a distance when he is coming to collect zakat.