Genesis 44:25 (KJV)

And we said unto my lord, We have a father, an old man, and a child of his old age, a little one; and his brother is dead, and he alone is left of his mother, and his father loveth him.

And thou saidst unto thy servants, Bring him down unto me, that I may set mine eyes upon him.

And we said unto my lord, The lad cannot leave his father: for if he should leave his father, his father would die.

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 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;