Sunan At-Tirmidhi

Narrated Shumair:that Abyad bin Hammal visited the Messenger of Allah (ﷺ) who asked him to set aside a reserve of salt(a mine). So he reserved it for him. As he was turning away, a man in the gathering said: ""Do you know what you reserved for him ? You merely reserved stagnant water for him."" He (Shumair) said: ""So he left him."" He (Shumair) said: ""So he asked him (the Prophet (ﷺ)) about making a private pasture of Arak (a type of tree)."" He said: ""As long as it is not harmed by the hooves of the camels."" So I (At-Tirmidhi) recited that before Qutaibah and he said: ""Yes"". (Another chain) with similar meaning