And they set for him by himself, and for them by themselves, and for the Mizraee who ate with him by themselves; for it was not proper for the Mizraee to eat bread with the Yehudaee, because the animals which the Mizraee worshipped the Yehudaee ate.
Why Egyptians Could Not Eat at a Hebrew Table
Targum Pseudo-Jonathan on Genesis 43:32