Abu Al-Minhal said: " I asked Al-Bara bin 'Azib and Zaid bin Arqam and they said: “We were merchants at the time of the Messenger of Allah and we asked the Prophet of Allah about money exchange. He said: "If it is done hand to hand there is nothing wrong with it, but if it is done on credit then it is not right”
SahihSahihHasanBook 44 · Hadith 128