Genesis 43:12, 15, 21

Take double the amount of silver with you, for you must return the silver that was put back into the mouths of your sacks. Perhaps it was a mistake.

So the men took the gifts and double the amount of silver, and Benjamin also. They hurried down to Egypt and presented themselves to Joseph.

But at the place where we stopped for the night we opened our sacks and each of us found his silver—the exact weight—in the mouth of his sack. So we have brought it back with us.