Genesis 44:28 (KJV)

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 the one went out from me, and I said, Surely he is torn in pieces; and I saw him not since:

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;