(38) باب بَيْعِ الصُّبْرَةِ مِنَ الطَّعَامِ بِالصُّبْرَةِ مِنَ الطَّعَامِ
Abu Zubair narrated that he heard Jabir bin 'Abdullah say:
"The Prophet said: 'A heap of grain should not be sold for a heap of grain, or for a heap of grain of known measure. "
Reference: Sunan an-Nasa'i 4548
In-book reference: Book 44, Hadith 100
English translation: Vol. 5, Book 44, Hadith 4552