Genesis 42:20

But bring your youngest brother unto me
Upon their return for more corn: so shall your words be verified;
that they were true men, and had no ill design upon the land, but were come only to buy corn: and ye shall not die;
as spies, which they were otherwise threatened with; and as it is customary in all nations to put such to death when found out: and they did so;
they left one of their brethren behind; they carried corn to their houses or families in Canaan, and brought their brother Benjamin with them when they returned to Egypt.