John Gill Commentary Genesis 43:31

"And he washed his face, and came out; and he refrained himself, and said, Set on bread." — Genesis 43:31 (ASV)

And he washed his face From the tears on it, that it might not be discerned that he had been weeping: and went out ; of his chamber into the room again, where his brethren were: and refrained himself ; from weeping, or showing any excess of passion, love, joy and said, set on bread ; gave orders to his servants to bring in dinner, and set it upon the table; bread, as before, being put for all kind of food.