From the coming of the month of Ijar, eat barley; from the month of Sivan, eat wheat, the most perfect among all seed-bearing herbs. And let your daily bread be made of wheat, that the Lord may take care of your bodies. From Tammuz, eat the sour grape, that your body may diminish and Satan may depart from it. in the month of Elul, gather the grape that the juice may serve you as drink. In the month of Marchesvan, gather the sweet grape, dried and sweetened by the angel of sun, that your bodies may increase, for the angels of the Lord dwell in them. You should eat figs rich in juice in the months of Ab and Shebat, and what remain, let the angel of sun keep them for you; eat them with the meat of almonds in all the months when the trees bear no fruits. And the herbs which come after rain, these eat in the month of Thebet, that your blood may be cleansed of all your sins. And in the same month begin to eat also the milk of your beasts, because for this did the Lord give the herbs of the fields to all the beasts which render milk, that they might with their milk feed man. For I tell you truly, happy are they that eat only at the table of God, and eschew all the abominations of Satan. Eat not unclean foods brought from far countries, but eat always that which your trees bear. For your God knows well what is needful for you, and where and when. And he gives to all peoples of all kingdoms for food that which is best for each. Eat not as the heathen do, who stuff themselves in haste, defiling their bodies with all manner of abominations.
~ Book I