Genesis 44:17 (KJV)

And he searched, and began at the eldest, and left at the youngest: and the cup was found in Benjamin's sack.

Then they rent their clothes, and laded every man his ass, and returned to the city.

And Judah and his brethren came to Joseph's house; for he was yet there: and they fell before him on the ground.

And Joseph said unto them, What deed is this that ye have done? wot ye not that such a man as I can certainly divine?

And Judah said, What shall we say unto my lord? what shall we speak? or how shall we clear ourselves? God hath found out the iniquity of thy servants: behold, we are my lord's servants, both we, and he also with whom the cup is found.

Then Judah came near unto him, and said, Oh my lord, let thy servant, I pray thee, speak a word in my lord's ears, and let not thine anger burn against thy servant: for thou art even as Pharaoh.

My lord asked his servants, saying, Have ye a father, or a brother?

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.