مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1959
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn "Abbas said: The Messenger of Allah (ﷺ) forbade muhaqalah and muzabanah[1], and ‘Ikrimah regarded it as makrooh to sell wheat or barley harvested when it is green. [1]Muhaqalah means selling the field for a known measure of grain. Muzabanah means selling the palm tree for some wasqs of dried dates.
Musnad Ahmad 1960Sahih (Darussalam) [ alBukhari (2187)]