This Bible contradiction is from the Skeptic's Annotated Bible.
Genesis 42:29-35 View context
And they came unto Jacob their father unto the land of Canaan, and told him all that befell unto them; saying,
The man, [who is] the lord of the land, spake roughly to us, and took us for spies of the country.
And we said unto him, We [are] true [men]; we are no spies:
We [be] twelve brethren, sons of our father; one [is] not, and the youngest [is] this day with our father in the land of Canaan.
And the man, the lord of the country, said unto us, Hereby shall I know that ye [are] true [men]; leave one of your brethren [here] with me, and take [food for] the famine of your households, and be gone:
And bring your youngest brother unto me: then shall I know that ye [are] no spies, but [that] ye [are] true [men: so] will I deliver you your brother, and ye shall traffick in the land.
And it came to pass as they emptied their sacks, that, behold, every man's bundle of money [was] in his sack: and when [both] they and their father saw the bundles of money, they were afraid.
At the inn.
Genesis 42:27 View context
And as one of them opened his sack to give his ass provender in the inn, he espied his money; for, behold, it [was] in his sack's mouth.
Genesis 43:21 View context
And it came to pass, when we came to the inn, that we opened our sacks, and, behold, [every] man's money [was] in the mouth of his sack, our money in full weight: and we have brought it again in our hand.