Genesis 37:27-28

27Come, let’s sell him to the Ishmaelites and not lay our hands on him; after all, he is our brother, our own flesh and blood.” His brothers agreed.

28So when the Midianite merchants came by, his brothers pulled Joseph up out of the cistern and sold him for twenty shekels That is, about 8 ounces or about 230 grams of silver to the Ishmaelites, who took him to Egypt.