Genesis 42:29-34

29And they came unto Jacob their father unto the land of Canaan, and told him all that befell unto them; saying, 30The man, who is the lord of the land, spake roughly to us, and took us for spies of the country.1 31And we said unto him, We are true men; we are no spies: 32We be twelve brethren, sons of our father; one is not, and the youngest is this day with our father in the land of Canaan. 33And 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: 34And 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.