John Gill Commentary Genesis 43:22

"And other money have we brought down in our hand to buy food: we know not who put our money in our sacks." — Genesis 43:22 (ASV)

And other money have we brought down in our hands to buy
food
Double money for a double quantity, or because the price of corn was now doubled; and their bringing this besides the other showed their honest and upright intentions: we cannot tell who put our money in the sacks;
we are quite ignorant of it, and can by no means account for it, and therefore hope no blame will be laid on us.