Genesis 44:10 (KJV)

Is not this it in which my lord drinketh, and whereby indeed he divineth? ye have done evil in so doing.

And he overtook them, and he spake unto them these same words.

And they said unto him, Wherefore saith my lord these words? God forbid that thy servants should do according to this thing:

Behold, the money, which we found in our sacks' mouths, we brought again unto thee out of the land of Canaan: how then should we steal out of thy lord's house silver or gold?

With whomsoever of thy servants it be found, both let him die, and we also will be my lord's bondmen.

Then they speedily took down every man his sack to the ground, and opened every man his sack.

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?