I asked Abu Abdillah (as) about a group of people who board a ship to purchase food. They negotiate the price, and one of them buys it. Then the others request portions of the food from him, and he provides it to them while the seller handles the weighing and receives the payment. Imam (as) said: "There is no harm in this. I do not see it as anything other than them sharing in the purchase." I said: "The seller calls a measurer to weigh it for us, and we have laborers who check the measurement, but sometimes it is slightly more or less." Imam (as) said: "There is no harm in it, as long as the error is not significant."