It wasnarrated that Kharijah bin Zaid said:
"I saw a man asking myfatherabout a man who goes out to fight and buys and sells and tradesduring his campaign. My father said to him: 'We were with theMessenger of Allah (ﷺ) in Tabuk, and we bought and sold, and he sawus and did not forbid us (to do that).'" (FR)
English reference (FR): Vol. 4, Book 24, Hadith 2823 (FR)
Arabic reference (FR): Book 24, Hadith 2930 (FR)