It was
narrated that Kharijah bin Zaid said:
“I saw a man asking my
father
about a man who goes out to fight and buys and sells and trades
during his campaign. My father said to him: ‘We were with the
Messenger of Allah (ﷺ) in Tabuk, and we bought and sold, and he saw
us and did not forbid us (to do that).’”