Genesis 44:28 (KJV)

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

And it came to pass when we came up unto thy servant my father, we told him the words of my lord.

And our father said, Go again, and buy us a little food.

And we said, We cannot go down: if our youngest brother be with us, then will we go down: for we may not see the man's face, except our youngest brother be with us.

And thy servant my father said unto us, Ye know that my wife bare me two sons:

And if ye take this also from me, and mischief befall him, ye shall bring down my gray hairs with sorrow to the grave.

Now therefore when I come to thy servant my father, and the lad be not with us; seeing that his life is bound up in the lad's life;

It shall come to pass, when he seeth that the lad is not with us, that he will die: and thy servants shall bring down the gray hairs of thy servant our father with sorrow to the grave.

For thy servant became surety for the lad unto my father, saying, If I bring him not unto thee, then I shall bear the blame to my father for ever.

Now therefore, I pray thee, let thy servant abide instead of the lad a bondman to my lord; and let the lad go up with his brethren.