وَعَنْ سَمُرَةَ بْنِ جُنْدُبٍ
أَنَّ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنْ بَيْعِ الْحَيَوَانِ بِالْحَيَوَانِ نَسِيئَةً
Samurah ibn Jundub told that the Prophet (sallallahu alayhi wa sallam), forbade selling animal for animals when payment was to be made at a later date. Tirmidhi, Abu Da.wud, Nasai.