Genesis 43:32-33

32So they served him by himself, and them by themselves, and the Egyptians who ate with him by themselves, because the Egyptians could not eat bread with the Hebrews, for that is 12loathsome to the Egyptians.

33Now they 3were seated before him, 4the firstborn according to his birthright and the youngest according to his youth, and the men looked at one another in astonishment.