GEN1398 After fighting the angel and getting injured (a battle of morality, no matter whose interpretation is followed), Jacob is instructed not to eat the sciatic nerve as a remembrance of this battle.   This Jewish law continues until today, tying the prohibition of eating part of the animal to the spiritual battle between Jacob and the angel.   Many more examples can be cited from the Torah (such as eating the Paschal lamb, eating matzah, manna, and so forth), which would show the same principle of tying food in Judaism to morality.   AMEMEI 73