B'resheet (Gen) 37:23-25

So it was that when Yosef arrived to be with his brothers, they stripped off his robe, the long-sleeved robe he was wearing, and took him and threw him into the cistern (the cistern was empty; without any water in it). Then they sat down to eat their meal; but as they looked up, they saw in front of them a caravan of Yishma‘elim coming from Gil‘ad, their camels loaded with aromatic gum, healing resin and opium, on their way down to Egypt.