(18) باب بَيْعِ الطَّعَامِ مِثْلاً بِمِثْلٍ
Ibn 'Abbas; (Allah be pleased with them) reported on the authority of Usama b. Zaid Allah's Messenger (ﷺ) as having said this:
There is no element of interest when the money or commodity is exchanged hand to hand.
Reference: Sahih Muslim 1596 c
In-book reference: Book 22, Hadith 129
USC-MSA web (English) reference(deprecated numbering scheme): Book 10, Hadith 3878