Genesis 37:26-28

And Juda said to his brethren: What will it profit us to kill our brother, and conceal his blood?

It is better that he be sold to the Ismaelites, and that our hands be not defiled: for he is our brother and our flesh. His brethren agreed to his words.

And when the Madianite merchants passed by, they drew him out of the pit, and sold him to the Ismaelites, for twenty pieces of silver: and they led him into Egypt.