Genesis 44:1-3

1And he commanded the steward of his house, saying, “Fill the men’s sacks with food, as much as they can carry, and put every man’s [grain] money in the mouth of the sack.

2Put my [personal] cup, the silver cup, in the mouth of the sack of the youngest, with his grain money.” And the steward did as Joseph had told him.

3As soon as the morning was light, the men were sent away, they and their donkeys.