Genesis

And thou saidst unto thy servants, Except your youngest brother come down with you, ye shall see my face no more.

And they said, The man asked us straitly of our state, and of our kindred, saying, Is your father yet alive? have ye another brother? and we told him according to the tenor of these words: could we certainly know that he would say, Bring your brother down?

And he said, Well; I will make a league with thee: but one thing I require of thee, that is, Thou shalt not see my face, except thou first bring Michal Saul’s daughter, when thou comest to see my face.

But if thou wilt not send him, we will not go down: for the man said unto us, Ye shall not see my face, except your brother be with you.

Hereby ye shall be proved: By the life of Pharaoh ye shall not go forth hence, except your youngest brother come hither.