Musannaf Ibn Abi Shaybah

Hazrat Amr bin Shu'aib narrates that I asked Hazrat Sa'id bin al-Musayyib (may Allah have mercy on him): Can I sell the fruits of my land and separate some portion from it? He replied: Do not make an exception; if you must, then separate a specific tree, but do not exempt it from charity either. The narrator says that I mentioned this to Hazrat Muhammad bin Sirin (may Allah have mercy on him), and he approved of this opinion.